Metabolic responses during hydraulic resistance exercise

• Published in: Medicine and science in sports and exercise 1987-08, Vol.19 (4), p.363-367
• Main Authors: Ballor, D L, Becque, M D, Katch, V L
• Format: Article
• Language: English
• Subjects: Adult; Energy Metabolism; Heart Rate; Humans; Male; Metabolism; Oxygen Consumption; Physical Education and Training; Physical Exertion; Space life sciences
• ISSN: 0195-9131
• DOI: 10.1249/00005768-198708000-00007

Thirteen college-age men under-went a treadmill (TM)-graded VO2max exercise test on 1 d and a 24.5-min hydraulic resistive exercise circuit on a following day. Seven exercises were performed in the following order: leg extension, bent-over row, bicep curl, squat, upright row, bench press, and behind-neck press. Each exercise was performed three times with the following work-to-rest timing: 30 s exercise, 30 s rest; 30 s exercise; 30 s rest; and 30 s exercise, 60 s rest (to allow for machine switch-over to the next exercise). Thus, each exercise took a total of 120 s, of which work was for 90 s and rest 120 s. During the circuit, heart rate averaged 153.8 b X min-1 (81.2% of TM max) and VO2 averaged 1.93 l X min-1 (41.4% of TM max). Oxygen uptake for the individual exercises ranged from 1.52 l X min-1 (32.6% of TM max) for the behind-neck-press exercise to 2.43 l X min-1 (52.1% of TM max) for the squat exercise. Heart rate ranged from 135.9 b X min-1 (71.8% of TM max) for the leg extension exercise to 163.4 b X min-1 (86.3% of TM max) for the squat exercise. Hydraulic circuit resistance exercise results in an average caloric expenditure of 40.8 kJ X min-1 (9.75 kcal X min-1).