Submaximal Exercise Heart Rate Research Articles

Transfer effects of endurance training to exercise with untrained limbs.

There has been a controversy over whether the increases in maximal oxygen uptake ( $$\dot V$$ O2 max) and reductions in heart rate at a given submaximal workload after endurance training are limited to exercise with trained limbs or also may be observed during exercise with untrained limbs. In the present study five initially very sedentary young men trained by leg cycling (LT) and five by arm cranking (AT) 30 min per day on 4 days a week for 11 weeks at an intensity ≥75–80% $$\dot V$$ O2 max. Before and after training the subjects performed submaximal and maximal arm cranking and leg cycling tests. Leg cycling and arm cranking $$\dot V$$ O2 max increased 15% and 9% after LT and 12% and 35% after AT, respectively. Heart rate at a given submaximal workload was lower (p<0.05) during trained and untrained limb exercise following LT and AT. However, subjective ratings of perceived exertion (RPE) at a given submaximal workload were lower (p<0.01) only during exercise with trained limbs after LT and AT. In light of previous findings, the present increases in $$\dot V$$ O2 max and reductions in submaximal exercise heart rate with untrained limbs suggest that the initial fitness of the subjects as well as the intensity, frequency, and duration of training may be important factors in determining the extent to which transfer effects of endurance training can be observed. Although the present data suggest that reductions in RPE after endurance training may be the result of local changes in trained muscles, the possible contribution of central nervous adaptations cannot be excluded.

Work Capacity, Muscle Strength and SDH Activity in Both Legs of Hemiparetic Patients and Patients with Parkinson's Disease

In recent muscle metabolic studies, patients with moderate upper motor neuron lesions showed marked difficulty in performing an equal submaximal work load (bilaterally) in two-legged exercise. For a better evaluation of these patients, studies were performed on each leg separately. Six patients with Parkinson's disease and six with moderate hemiparesis were studied. During one-legged submaximal and maximal exercise heart rate, oxygen uptake, and blood lactate were determined. Maximal voluntary contraction in knee and ankle flexion and extension for each leg was measured. Succinate dehydrogenase (SDH) activity in the thigh muscles was determined. During submaximal exercise, oxygen uptake, heart rate and blood lactate increased more in the paretic leg of hemiparetic patients and in the more affected leg of the Parkinson patients. In hemiparetic patients maximal voluntary contraction of flexors and extensors of the knee was significantly reduced in the paretic leg but was reduced even in the nonparetic knee flexors. SDH activity was very low in both legs in all patients and lowest in the paretic and more affected leg, respectively. It is concluded that (a) the general muscle inactivity per se, secondary to the neurological disorder, may lead to a reduced work capacity; (b) the increased heart rate and blood lactate level seem to be correlated to the relative exercise level of each leg; and (c) in patients with impaired muscle function of one or both legs, evaluation of each leg separately with regard to work capacity and muscle metabolism is of value.

Divergent Effects of Physical Training and Nitroglycerin in Coronary Heart Disease.

Meeting Abstracts1 May 1971Divergent Effects of Physical Training and Nitroglycerin in Coronary Heart Disease.J-M. R. Detry, M.D., R. A. Bruce, M.D., F.A.C.P.J-M. R. Detry, M.D.Search for more papers by this author, R. A. Bruce, M.D., F.A.C.P.Search for more papers by this authorAuthor, Article, and Disclosure Informationhttps://doi.org/10.7326/0003-4819-74-5-819_2 SectionsAboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinkedInRedditEmail ExcerptMaximal oxygen intake (VO2) and ECG responses to multistage treadmill test were determined before and after 3 months of physical training in 14 patients with coronary heart disease. Responses to 0.4 mg nitroglycerin sublingually were measured before training in 11 of these patients. The ST-segment responses were measured by computer averaging 100 beat samples.After training maximal VO2increased by 20.8% (P< 0.001), mainly by a greater maximal A-VO2difference. At submaximal exercise heart rate, blood pressure, and pressure-rate product were lower after training and the ST segment less depressed (P< 0.05). At maximal exercise, however, heart rate... This content is PDF only. To continue reading please click on the PDF icon. Author, Article, and Disclosure InformationAffiliations: Seattle, Wash. PreviousarticleNextarticle Advertisement FiguresReferencesRelatedDetails Metrics Cited byEarly exercise training in patients older than age 65 years compared with that in younger patients after acute myocardial infarction or coronary artery bypass graftingCirculatory and Symptomatic Effects of Physical Training in Patients with Coronary-Artery Disease and Angina Pectoris 1 May 1971Volume 74, Issue 5Page: 819-819KeywordsBlood pressureComputersCoronary heart diseaseExerciseHeart rateOxygenOxygen consumption per unit time Issue Published: 1 May 1971 PDF downloadLoading ...