Resistance Training on Growth Factors

The HIRT protocol comprised five exercises (bench press, barbell back squat, deadlift, seated leg flexion, and reverse arm curl) at 80% of 1RM, and 4-5 sets of 12 repetitions with 1-2 minutes of rest period between sets for approximately 60 minutes.

For LIRT protocol, which performed same training exercises as HIRT. The repetitions in the LIRT protocol were assessed using the following equation: 80% of 1RM lifting load (kg) ×repetitions (HIRT)/40% of 1RM to volition fatigue, with 1-2 minutes of rest period between sets. Therefore, the LIRT protocol completed 4-5 sets of 24 repetitions at 40% of 1RM for a total of 60 minutes.