Metabolic and perceptual responses during Spinning cycle exercise.
OBJECTIVE
The present investigation was undertaken to compare metabolic and perceptual responses between exercise performed at constant intensity (CON) and with a Spinning protocol of variable intensity (VAR).


METHODS
Fifteen subjects, including seven males and eight females (23 +/- 5 yr, 72 +/- 17 kg, and 171 +/- 10 cm), underwent two experimental trials. During each trial, subjects performed a 30-min cycle exercise protocol that was followed by a 30-min recovery period. Exercise was performed at 67 +/- 3% (means +/- SD) of HR(max) in CON. In VAR, the similar intensity (68 +/- 4% HR(max)) was also achieved, although the protocol entailed alternating phases of both higher and lower intensity arranged similarly to what is designed for a typical Spinning workout. Oxygen uptake (VO2) and HR were measured at rest and throughout both exercise and recovery, whereas RPE were recorded during exercise only. Plasma lactate concentrations [La] were determined at rest, the end of exercise, and the end of recovery.


RESULTS
No differences in average VO2, HR, and RPE were found during exercise between CON and VAR. However, average VO2 and HR were higher (P < 0.05) in VAR than CON (0.33 +/- 0.03 vs 0.26 +/- 0.02 L x min(-1) and 91 +/- 3 vs 80 +/- 2 beats x min(-1), respectively). [La] was higher (P < 0.05) at the end of exercise in VAR than CON (7.2 +/- 0.8 vs 2.7 +/- 0.3 mmol x L(-1)), but became similar at the end of recovery.


CONCLUSIONS
An exercise regimen in which intensity varies exerts no added effect on metabolic and perceptual responses during exercise as long as the average intensity is kept the same. However, VAR resulted in a greater [latin capital V with dot above]O2 after exercise, and this augmented postexercise oxygen consumption may be mediated in part by elevated plasma [La].
Kang
Jie
J
Department of Health and Exercise Science, The College of New Jersey, Ewing, NJ 08628, USA. kang@tcnj.edu
Chaloupka
Edward C
EC
Mastrangelo
M Alysia
MA
Hoffman
Jay R
JR
Ratamess
Nicholas A
NA
O'Connor
Elizabeth
E
D000328:Adult; D004734:Energy Metabolism / Q000502:physiology; D005080:Exercise Test; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D010465:Perception; D010806:Physical Education and Training / Q000379:methods*; D005082:Physical Exertion / Q000502:physiology; D020127:Recovery of Function / Q000502:physiology
D019344:Lactic Acid