Power Training Program Research Articles

12주 파워운동이 여성노인의 삶의 질과 기능적 체력에 미치는 효과

본 연구의 목적은 12주 파워운동이 여성노인의 삶의 질과 기능적 체력에 미치는 효과를 검증하는 것이다. 충청권 A시의 B읍과 O시에 거주하는 21명을 피험자로 선정하였으며 실험집단 10명, 통제집단 11명을 무선배정하여 구분시킨 후, 전후검사 통제집단설계를 적용하여 자료를 수집하였다. 도출된 연구결과를 통한 주요 결론은 다음과 같다. 첫째, 12주 파워운동이 여성노인의 하지근력, 하지유연성, 동적평형성, 전신지구력 향상에 효과를 보였다. 둘째, 12주 파워운동이 여성노인의 삶의 질에서 신체적, 심리적 향상에 효과를 보였다. 따라서 필연적으로 맞이하는 노화를 지연시키면서 건강의 위험성을 낮추는 방안으로 여성노인들에게 파워운동이 도움이 된다는 결론을 도출하였다.

СУЧАСНИЙ ПОГЛЯД НА ЗАСТОСУВАННЯ ІНФОРМАЦІЙНОКОМУНІКАЦІЙНИХ ТЕХНОЛОГІЙ У ПРОФЕСІЙНІЙ ПІДГОТОВЦІ МАЙБУТНІХ МАГІСТРІВ ФІЗИЧНОЇ КУЛЬТУРИ І СПОРТУ

The article considers the application of information and communication technologies in the professional training of future of physical training and sports masters in modern conditions. It is noted that informatization of higher education is one of the most important means of improving the quality of training. The main parameters for the classification of information and communication technologies used in the masters’ training are determined. The main distinctive features of e-learning and distance learning are analyzed. The purpose of the study is the application of information and communication technologies in the training of future physical training and sports masters in terms of modernity. Theoretical analysis of scientific and methodological literature on certain issues, data comparison and generalization, comparison of different views on the research problem is used. Information and communication technologies used in the training of future PT and sports masters are: text editors, Power Point presentations, spreadsheets, online tests, Internet resources, training programs, multimedia dictionaries, electronic textbooks, distance learning, online competitions and contests, student research papers. The main directions that require additional research on the application of interactive learning technologies based on information tools are summarized. Information and communication technologies can significantly increase the efficiency of the educational process, solve the tasks set before the education institution to educate a comprehensively developed, creatively free personality. The analysis of scientific and pedagogical literature on the research problem shows that in modern conditions of educational development the interest of scientists in information technologies, their didactic potential and possibilities of application in the field of physical education and sports is being growing.

Effects of Combined Strength and Power Training on Physical Performance and Interlimb Asymmetries in Adolescent Female Soccer Players.

To examinethe effects of an 8-week combined strength and power training intervention on physical performance and interlimb asymmetries in adolescent female soccer players. Thirty-seven adolescent female soccer players (age 16.1 [1.1]y) were randomly assigned to a control group (n = 18) or experimental group (n = 19). The experimental group performed combined strength and power training twice a week, which consisted of strength and power exercises that trained the major muscles of the lower body and trunk musculature. Preintervention and postintervention tests included unilateral and bilateral horizontal and countermovement jump tests, a 40-m sprint test (10- and 30-m split times), a 10-m sprint with a 180° change-of-direction (COD) test, and a multiple-COD test (V-cut test). Asymmetries were also analyzed in the unilateral tests. Significant group-by-time interaction of the improvement between pretest and posttest was observed for speed (effect size [ES]: -1.30 to -1.16) and COD tests (ES: -0.62 to -0.61) but not in jumping (ES: -0.09 to 0.28) and interlimb-asymmetry tests (ES: -0.13 to 0.57). The short-term in-season combined strength and power training program induced greater speed and COD performance improvements than soccer training alone in adolescent female soccer players.

Effects of Supplementary Strength-Power Training on Neuromuscular Performance in Young Female Athletes.

This study examined the effects of a short-duration supplementary strength–power training program on neuromuscular performance and sport-specific skills in adolescent athletes. Twenty-three female “Gymnastics for All” athletes, aged 13 ± 2 years, were divided into a training group (TG, n = 12) and a control group (CG, n = 11). Both groups underwent a test battery before and after 10 weeks of intervention. TG completed, in addition to gymnastics training, a supplementary 7–9 min program that included two rounds of strength and power exercises for arms, torso, and legs, executed in a circuit fashion with 1 min rest between rounds, three times per week. Initially, six exercises were performed (15 s work–15 s rest), while the number of exercises was decreased to four and the duration of each exercise was increased to 30 s (30 s rest) after the fifth week. TG improved countermovement jump performance with one leg (11.5% ± 10.4%, p = 0.002) and two legs (8.2% ± 8.8%, p = 0.004), drop jump performance (14.4% ± 12.6%, p = 0.038), single-leg jumping agility (13.6% ± 5.2%, p = 0.001), and sport-specific performance (8.8% ± 7.4%, p = 0.004), but not 10 m sprint performance (2.4% ± 6.6%, p = 0.709). No change was observed in the CG (p = 0.41 to 0.97). The results of this study indicated that this supplementary strength–power program performed for 7–9 min improves neuromuscular and sport-specific performance after 10 weeks of training.

A Comparison of Bilateral vs. Unilateral-Biased Strength and Power Training Interventions on Measures of Physical Performance in Elite Youth Soccer Players

Stern, D, Gonzalo-Skok, O, Loturco, I, Turner, A, and Bishop, C. A comparison of bilateral vs. unilateral-biased strength and power training interventions on measures of physical performance in elite youth soccer players. J Strength Cond Res 34(8): 2105-2111, 2020-The aim of the present study was to compare the effects of bilateral and unilateral-biased strength and power training programs on measures of physical performance in male youth soccer players. Twenty-three elite youth players (age: 17.6 ± 1.2 years) were randomly assigned to either a unilateral (n = 11) or a bilateral (n = 12) group, who completed a strength and power intervention, twice per week for 6 weeks. The unilateral group completed rear foot elevated split squats (RFESS), single-leg countermovement jumps (SLCMJs), single-leg drop jumps (SLDJs), and single-leg broad jumps (SLBJs). The bilateral group intervention performed back squats, CMJs, drop jumps (DJ), and broad jumps (BJ). A 2 × 2 repeated measures analysis of variance showed no between-group differences. However, within-group differences were evident. The bilateral training group showed significant (p < 0.05) improvements in back squat strength (d = 1.27; %Δ = 26.01), RFESS strength (d = 1.64; %Δ = 23.34), BJ (d = 0.76; %Δ = 5.12), 10-m (d = -1.17; %Δ = 4.29), and 30-m (d = -0.88; %Δ = 2.10) performance. The unilateral group showed significant (p < 0.05) improvements in RFESS strength (d = 1.40; %Δ = 33.29), SLCMJ on the left leg (d = 0.76; %Δ = 9.84), SLBJ on the left leg (d = 0.97; %Δ = 6.50), 10 m (d = -1.50; %Δ = 5.20), and 505 on the right leg (d = -0.78; %Δ = 2.80). Standardized mean differences showed that bilateral training favored improvements in back squat strength and unilateral training favored improvements in RFESS strength, SLDJ on the right leg and 505 on the right leg. These results show that although both training interventions demonstrated trivial-to-large improvements in physical performance, the notion of training specificity was evident with unilateral training showing greater improvements in unilateral test measures.

Comparison of High-Intensity Resistance and Power Training Programs in Pre-Frail and Frail Older Adults

Aims: The purpose of this study was to determine if high-intensity resistance training or power training is more effective in improving strength and functional outcomes in pre-frail and frail older adults.Methods: Participants underwent a 10-week intervention, two times per week, performing either high-intensity resistance or power training programs. Strength and functional outcome measurements were performed pre and post-intervention, with statistical analyses completed to compare the relative impact of the two interventions.Results: High-intensity resistance training outperformed power training in 4/14 dependent variables; including one repetition maximum strength of three muscle groups, and 30 second sit to stand performance. Power training did not result in statistically greater change relative to high-intensity resistance training in any outcomes measured.Conclusions: Further research comparing the two training methods is necessary to determine which intervention is more effective in impacting frailty, and its associated impairments, in older adults.

Exploration of Habitual Walking Behavior and Home-Based Muscle Power Training in Individuals With Total Knee Arthroplasty

The purpose of this study was to investigate the effects of a home-based muscle power training program on muscle strength and power, functional performance, and physical activity behavior in individuals at least 6 months posttotal knee arthroplasty. Twelve men and women, mean age 63.9 (6.8) and 6 months to 2 years posttotal knee arthroplasty unilateral or bilateral), completed this study. Participants were randomly assigned to the home-based power training intervention or step-monitoring comparison group. Quadriceps muscle strength and power, 6-minute walk test, functional leg power, and habitual walking behavior (average daily steps, minutes per week of moderate to vigorous physical activity) were assessed before and after intervention and then compared between and within groups. The authors found no significant differences between the groups on amount of change in any of the outcomes, but mixed results on differences within each of the groups on the outcome measures. There were no differences between the groups for amount of change on the outcome measures the authors selected. Although within group differences varied slightly for each group, it was not enough to justify the more expensive home-based power training over the simpler step-monitoring intervention.

Effects of a potency and hypertrophy training programs on bone mineral density and mean power in people with multiple sclerosis for 7 weeks. A preliminary study

The alteration in nerve conduction produced by MS leads to functional displacement. Specifically, this increase produces losses of muscle mass, bone mineral density (BMD) and power as well as an increase in fat mass. In general, physical exercise has shown improvements at the functional level, however, strength training seems to show the best results for these parameters. The purpose of this study was to evaluate the effects of two power and hypertrophy training programs on BMD and potency in people with MS. Ten subjects with MS participated with a mean age of 56 years, of which eight were women and two men. The sample was divided into two groups randomly. Each group is assigned a training program randomly. BMD, power, strength and speed measurements were obtained before and after both training programs. Differences were found in the BMD variables in the hypertrophy training group (EH) and in the potency of the power training group (PE). No differences found between both groups were found for any of the other variables. Hypertrophy training reduces BMD and does not improve power, strength and speed. While power training improves potency and does not improve the body composition of this type of population.

Improved Sprint Performance With Inhaled Long-Acting β2-Agonists Combined With Resistance Exercise.

To investigate the impact of twice-daily inhalation of 100µg of salmeterol (SAL) or 12µg of formoterol (FOR) in addition to a strength- and power-training program over a 5-wk period on a 30-m sprint, strength, power, mood, stress, and skinfold thickness. In a randomized, single-blind study, 23 male and 15 female nonasthmatic, recreationally active individuals were recruited (mean [SD] age 26.3 [5.4]y, weight 76.2 [11.5]kg, height 176.9 [8.5]cm). Participants completed 3 standardized whole-body strength- and power-training sessions per week for 5wk during which they were assigned to an SAL, FOR, or placebo group. Participants used their inhaler twice per day as instructed and completed assessments of sprint, strength, and power at baseline and 1wk after cessation of the training program. The assessments included a 30-m sprint, vertical jump, 1-repetition-maximum (1RM) bench press, 1RM leg press, peak torque flexion and extension, anthropometric evaluation, and Rest-Q questionnaires. After 5 wk of strength and power training, 30-m sprint time reduced in the FOR (0.29 [0.11]s, P = .049) and SAL (0.35 [0.05]s, P = .040) groups compared with placebo (+0.01 [0.11]s). No significant change was found in other assessments of strength, mood, or skinfold thickness. When strength and power training are combined with the inhalation of FOR or SAL over a 5-wk period, moderately trained individuals experience an improvement in 30-m sprint performance.

Effects of functional power training on gait kinematics in children with cerebral palsy

BackgroundMuscle weakness is one of the most prevalent symptoms in children with cerebral palsy (CP). Although recent studies show that functional power training can improve strength and functional capacity in young children with CP, effects on specific gait parameters have not previously been reported. Research questionWhat are the effects of functional power training on gait in children with CP? Specifically, we investigated effects of training on gait kinematics and spatiotemporal parameters, and whether these were dependent on walking speed. MethodsTen children with CP (age 5–10 years, GMFCS I–II) participated in a functional power training program. At the start and end of the program, children underwent 3D gait analysis on a treadmill at a gradual range of walking speeds (70–175% of their comfortable walking speed). Multilevel (linear mixed model) analysis was used to evaluate effects pre-post training at different walking velocities. ResultsAlthough children’s self-chosen comfortable walking speed improved (0.71 ± 0.25 to 0.85 ± 0.25 m/s, p < .05), effects on gait kinematics at similar speed were limited and only exceeded statistical and clinically meaningful thresholds when children walked at higher walking speed. At fast speeds, improvements up to 5° were found in knee and hip extension during stance (p < .01). SignificanceThis study demonstrates that gait kinematics can improve after functional power training, but the magnitude of effects is dependent on walking speed. In this light, improvements are underestimated when evaluating gait at pre-training comfortable walking speed only.

The Effects of Functional Progressive Strength and Power Training in Children With Unilateral Cerebral Palsy.

The purpose of this study was to investigate the effects of a novel functional strength and power-training program on gait and gross motor function in participants with unilateral cerebral palsy. This 12-week trial of functional strength and power training included 30 participants with cerebral palsy, randomly assigned to the experimental or comparison group. The primary outcomes, 1-minute walk test, muscle power, and the Gross Motor Function Measure, were assessed at baseline and 12 weeks after the intervention. Secondary outcomes included dynamic balance as measured by Timed Up and Go, muscle strength, and 1-repetition maximum measures. Significantly greater improvements were seen in the experimental group for muscle power, Gross Motor Function Measure E score, and 1-minute walk test (P < .05), as well as for dynamic balance, 1-repetition maximum, and muscle strength. Functional strength training combined with plyometric exercises improved gait and gross motor function, dynamic balance, muscle strength, and power. For more insights from the authors, access Supplemental Digital Content 1, available at: http://links.lww.com/PPT/A254.

8주간 파워트레이닝 프로그램이 엘리트 대학축구 선수의 하지근력, 무산소성 파워 및 젖산변화에 미치는 효과

8주간 파워트레이닝 프로그램이 엘리트 대학축구 선수의 하지근력, 무산소성 파워 및 젖산변화에 미치는 효과

Effects of a Six-Week Strength and Power Training Program on Punching and Kicking Impact Power in Amateur Male Combat Athletes: A Pilot Study

The purpose of the present study was to examine the effect of a six-week strength and power training program, on striking impact power in amateur male combat athletes. A convenience sample of 16 amateur male combat athletes with at least two years combat training experience were assigned to either a strength and power training program (SPT, n=10) or control group (CT, n=6). Both groups performed three weekly combat training sessions for six weeks. The SPT group performed two sixty-minute SPT sessions in addition to usual combat training. The following variables: leadhand jab, rear-hand cross, front kick and roundhouse kick mean impact power, vertical jump height, and five-repetition maximum (5RM) half-squat and bench press, were measured using standard protocols at baseline and after six weeks. Magnitude-based inferences (Cohen’s d (d) ± 90% CI) revealed likely beneficial effects of SPT on cross punch (d=0.69 ±0.76), roundhouse kick power (d=0.86 ± 0.83), and vertical jump (d=0.53 ± 0.66). Benefits of usual combat training were unclear for all measured parameters. When between-group changes across the six-week period were compared SPT demonstrated likely benefits for cross-punch (d=0.75 ± 0.80) and 5RM half-squat (d=0.81 ±0.78) compared to usual combat training. These data suggest the addition of SPT to combat training may have a beneficial effect on cross-punch impact power and 5RM half-squat strength in amateur male combat athletes.

특이적 파워 트레이닝 프로그램이 엘리트 축구선수들의 유산소 기능 및 체력요인에 미치는 영향

특이적 파워 트레이닝 프로그램이 엘리트 축구선수들의 유산소 기능 및 체력요인에 미치는 영향

Increased rate of force development during periodized maximum strength and power training is highly individual.

Maximum strength training induces various improvements in the rate of force development (RFD) on a group level, but no study has investigated inter-individual adaptations in RFD. Fourteen men (28 ± 6 years old) performed the same 10-week maximum strength and then a 10-week power training program. Maximal force and RFD were recorded during maximal isometric leg extension voluntary contractions repeatedly before every 7th training session (2 sessions/week). After the intervention, subjects were retrospectively divided into three groups based on their RFD improvements: (1) improved only during the maximum strength period (MS-responders, + 100 ± 35%), (2) improved only during the power period (P-responders, + 53 ± 27%) or (3) no improvement at all (non-responders, + 3 ± 9%). All groups increased dynamic 1RM equally, but baseline 1RM was greater (p < 0.05) in responder vs non-responder groups. MS-responders had higher electrical stimulation-induced torque at baseline and they improved (+ 35 ± 28%) power production at 50% 1RM load more than P- (- 7 ± 20%, p = 0.052) and non-responders (+ 3 ± 6%, p = 0.066) during the maximum strength training period. MS-responders increased vastus lateralis cross-sectional area (+ 12 ± 9%, p < 0.01) as did P-responders (+ 10 ± 7%, p = 0.07), whereas non-responders were unchanged. Free androgen index (FAI) in responders was higher (+ 34%, p < 0.05) compared to non-responders at baseline. The maximum strength period decreased testosterone (- 17 ± 12; 17 ± 22%), FAI ratio (- 12 ± 14; - 21 ± 23%) and testosterone/cortisol ratio (- 17 ± 25; - 31 ± 20%) in MS and P-responders, respectively. During the P-period hormonal levels plateaued. To conclude, periodized strength training induced different inter-individual physiological responses, and thus RFD development may vary between individuals. Therefore, RFD seems to be a useful tool for planning and monitoring strength training programs for individual neuromuscular performance needs.

Effects of Resisted Sprint Training and Traditional Power Training on Sprint, Jump, and Balance Performance in Healthy Young Adults: A Randomized Controlled Trial.

Power training programs have proved to be effective in improving components of physical fitness such as speed. According to the concept of training specificity, it was postulated that exercises must attempt to closely mimic the demands of the respective activity. When transferring this idea to speed development, the purpose of the present study was to examine the effects of resisted sprint (RST) vs. traditional power training (TPT) on physical fitness in healthy young adults. Thirty-five healthy, physically active adults were randomly assigned to a RST (n = 10, 23 ± 3 years), a TPT (n = 9, 23 ± 3 years), or a passive control group (n = 16, 23 ± 2 years). RST and TPT exercised for 6 weeks with three training sessions/week each lasting 45–60 min. RST comprised frontal and lateral sprint exercises using an expander system with increasing levels of resistance that was attached to a treadmill (h/p/cosmos). TPT included ballistic strength training at 40% of the one-repetition-maximum for the lower limbs (e.g., leg press, knee extensions). Before and after training, sprint (20-m sprint), change-of-direction speed (T-agility test), jump (drop, countermovement jump), and balance performances (Y balance test) were assessed. ANCOVA statistics revealed large main effects of group for 20-m sprint velocity and ground contact time (0.81 ≤ d ≤ 1.00). Post-hoc tests showed higher sprint velocity following RST and TPT (0.69 ≤ d ≤ 0.82) when compared to the control group, but no difference between RST and TPT. Pre-to-post changes amounted to 4.5% for RST [90%CI: (−1.1%;10.1%), d = 1.23] and 2.6% for TPT [90%CI: (0.4%;4.8%), d = 1.59]. Additionally, ground contact times during sprinting were shorter following RST and TPT (0.68 ≤ d ≤ 1.09) compared to the control group, but no difference between RST and TPT. Pre-to-post changes amounted to −6.3% for RST [90%CI: (−11.4%;−1.1%), d = 1.45) and −2.7% for TPT [90%CI: (−4.2%;−1.2%), d = 2.36]. Finally, effects for change-of-direction speed, jump, and balance performance varied from small-to-large. The present findings indicate that 6 weeks of RST and TPT produced similar effects on 20-m sprint performance compared with a passive control in healthy and physically active, young adults. However, no training-related effects were found for change-of-direction speed, jump and balance performance. We conclude that both training regimes can be applied for speed development.

Feasibility of a community-based Functional Power Training program for older adults

PurposeCommunity-based programs can increase and sustain physical activity participation in older adults, even for those who are physically frail. We studied the feasibility and potential effect of a 12-week structured Functional Power Training (FPT) program involving high velocities and low loads for older adults conducted in a common area of their housing estate.Patients and methodsThe structured FPT program was conducted in collaboration with a health promotion social enterprise and a community service provider based in a public housing site. We recruited nine inactive residents as participants to the single, group-based, twice-weekly program. Attendance and adverse event(s) were recorded throughout the program. The Short Physical Performance Battery, Timed Up and Go (TUG), and 30s Sit-to-Stand tests were used to assess functional outcomes pre- and postprogram. The FRAIL Scale was used to assess their frailty status, and a postprogram experience survey was conducted.ResultsEight subjects (aged 74±10 years) completed the program with an average overall attendance of 90.3%, with at least five participants present for each session. Changes in functional outcomes showed a moderate-to-large effect with significant improvement in TUG (p<0.01). In addition, participants either reversed or maintained their frailty status (p<0.01). Overall, the program was perceived to be well structured, engaging, as well as providing physical and psychosocial benefits. No exercise-related adverse events occurred during the program, and participants were keen to recommend this program to others.ConclusionCommunity-based structured FPT is safe and feasible for frail older adults, with the potential to improve function and reverse frailty status.

The effect of different training programs on throwing accuracy of elite female handball players

The aim of this study is to examine the acute effect of different training programs applied to elite female handball players on throwing accuracy. 14 elite female players were participated in the study. The mean age of the participating players was 28.64 ± 9.88 (years), the mean height length was 176.50 ± 4.86 (cm), the mean body weight was 68.07 ± 2.12 (kg) and the mean sport age was 14.36 ± 4.89 (years). On different days, a technical training program, maximal strength training program, strength endurance training program and speed power training program have been implemented to the participating players in the research. Before and after training, the players throwing the ball from their area to the specific points of goal and the percentage of accuracy was determined. As a result; there was a significant difference between before and after maximal strength training the mean values of throwing accuracy (p&lt;0,05) but there was no significant difference before and after other training programs (p&gt; 0,05). This result indicates that acute maximal strength training has a negative effect on throwing accuracy.

Effectiveness of Traditional Strength vs. Power Training on Muscle Strength, Power and Speed with Youth: A Systematic Review and Meta-Analysis.

Numerous national associations and multiple reviews have documented the safety and efficacy of strength training for children and adolescents. The literature highlights the significant training-induced increases in strength associated with youth strength training. However, the effectiveness of youth strength training programs to improve power measures is not as clear. This discrepancy may be related to training and testing specificity. Most prior youth strength training programs emphasized lower intensity resistance with relatively slow movements. Since power activities typically involve higher intensity, explosive-like contractions with higher angular velocities (e.g., plyometrics), there is a conflict between the training medium and testing measures. This meta-analysis compared strength (e.g., training with resistance or body mass) and power training programs (e.g., plyometric training) on proxies of muscle strength, power, and speed. A systematic literature search using a Boolean Search Strategy was conducted in the electronic databases PubMed, SPORT Discus, Web of Science, and Google Scholar and revealed 652 hits. After perusal of title, abstract, and full text, 107 studies were eligible for inclusion in this systematic review and meta-analysis. The meta-analysis showed small to moderate magnitude changes for training specificity with jump measures. In other words, power training was more effective than strength training for improving youth jump height. For sprint measures, strength training was more effective than power training with youth. Furthermore, strength training exhibited consistently large magnitude changes to lower body strength measures, which contrasted with the generally trivial, small and moderate magnitude training improvements of power training upon lower body strength, sprint and jump measures, respectively. Maturity related inadequacies in eccentric strength and balance might influence the lack of training specificity with the unilateral landings and propulsions associated with sprinting. Based on this meta-analysis, strength training should be incorporated prior to power training in order to establish an adequate foundation of strength for power training activities.

Hip mechanics underlie lower extremity power training-induced increase in old adults’ fast gait velocity: The Potsdam Gait Study (POGS)

BackgroundAging is associated with slowed gait and old compared with young adults generally walk with greater positive hip work (H1) and reduced positive ankle work (A2). The role of exercise interventions on old adults’ gait mechanics that underlie training-induced improvements in gait velocity is unclear. We examined the effects of lower extremity power training and detraining on old adults’ gait kinetics. MethodsAs part of the Potsdam Gait Study (POGS), healthy old adults completed a no-intervention control period (69.1±4.4yrs, n=14) or a power training program followed by detraining (72.9±5.4yrs, n=15). We measured isokinetic knee extensor and plantarflexor power and measured hip, knee and ankle kinetics at habitual, fast and standardized walking speeds. ResultsPower training significantly increased isokinetic knee extensor power (25%), plantarflexor power (43%), and fast gait velocity (5.9%). Gait mechanics underlying the improved fast gait velocity included increases in hip angular impulse (29%) and H1 work (37%) and no changes in positive knee (K2) and A2 work. Detraining further improved fast gait velocity (4.7%) with reductions in H1 (−35%), and increases in K2 (36%) and A2 (7%). ConclusionPower training increased fast gait velocity in healthy old adults by increasing the reliance on hip muscle function and thus further strengthened the age-related distal-to-proximal shift in muscle function.