Abstract
Heart rate (HR) during different endurance cycling races and events are investigated for professional cyclist, however, enduro races to compete for total laps and distance covered within a fixed time using a circuit course has not yet been investigated. This study examined the heart rate (HR) and exercise intensity during an enduro cycling race. Ten male Japanese amateur cyclists performed cycling individually for at least 2 consecutive hours. HR was measured using an HR monitor during the race, and we estimated the energy expenditure (EE) during the race using the HR–VO2 relationship in advance. Exercise intensities were defined as percentages of HRmax based on ACSM exercise guideline as follows: moderate intensity, 64–76% HRmax; vigorous intensity, 77–95% HRmax. The HR during the race was 158.9 ± 10.6 bpm (86.4 ± 2.2% HRmax), and exercise intensity is categorized as vigorous intensity. The EE during the race using HR–VO2 relationship were 12.9 ± 1.2 kcal/kg/hr, which would require a large energy expenditure (EE) during the race. However, energy cost was 0.36 ± 0.04 kcal/kg/km regardless of total distance. The findings indicate that enduro cycling racing is categorized as vigorous intensity (>77% HRmax) for healthy male recreational cyclists though, cycling is an efficient form of transportation.
Highlights
Cycling exercise is one of the most popular aerobic-type physical activities in a wide range of age groups; walking and jogging have grown in popularity in recent years as sports.The exercise modality physiological responses of cycling is different in walking and jogging, cycling is a non-weight-bearing exercise, and involves mainly concentric muscle contractions and muscular damage is lower in cycling as compared to jogging [1,2]
Endurance races like enduro races to compete for total laps and distance covered within a fixed time using a circuit course are gaining popularity in Japan
Reported in a case report (36-year-old, a well-trained male amateur) that the overall intensity during the ride for 20 hours 51 min was moderate (HRmean = 131 bpm, HRmax = 184 bpm). They reported that the mean values of the HRmean and HRmax measured during a cycle-touring event race were 145 and 188 bpm, respectively, for 14 male healthy recreational cyclists (36 ± 6 years old), resulting in a mean HRmean/HRmax ratio of 0.77
Summary
Cycling exercise is one of the most popular aerobic-type physical activities in a wide range of age groups; walking and jogging have grown in popularity in recent years as sports.The exercise modality physiological responses of cycling is different in walking and jogging, cycling is a non-weight-bearing exercise, and involves mainly concentric muscle contractions and muscular damage is lower in cycling as compared to jogging [1,2]. Cycling exercise is one of the most popular aerobic-type physical activities in a wide range of age groups; walking and jogging have grown in popularity in recent years as sports. Cycling could be performed in majority populations regardless of age, sex, body mass, and fitness level. Different cycling events and races are held to compete for time or total distance. Endurance races like enduro races to compete for total laps and distance covered within a fixed time using a circuit course are gaining popularity in Japan. Regarding physiological responses and exercise intensity during different cycling events and races, measurement of heart rate (HR) responses using an automated HR monitor has been investigated [3,4,5,6,7]
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