2.2.1. Comb-NMES Intervention
Tetanic muscular contractions
CONTRACTIONS
Comb-NMES included NMES-resistance exercise and NMES-aerobic exercise three days per week (M, W, and F), separated by a rest day. NMES resistance required concentric and eccentric quadricep contractions while seated. Each session had four sets of ten repetitions that were elicited using 450 µs biphasic pulses at 50 Hz. Surface NMES was used to carry out the protocol. Tetanic muscular contractions that evoke complete knee extension were induced by raising the current from zero to the goal level (50–200 mA) in 3 to 5 s. Following the production of the knee extension, the current was quickly reduced (an additional 3–5 s) to allow for progressive relaxation into a flexed position. There was normally a 5 min break between sets because both legs were worked in an alternating fashion [