Order of same-day concurrent training influences some indices of power development, but not strength, lean mass, or aerobic fitness in healthy, moderately-active men after 9 weeks of training

Methodology

Randomized controlled trial (RCT)

Population

29 healthy, moderately active men (24.5 ± 4.7 y) randomised to RT (n=9), HIIT+RT (n=10) or RT+HIIT (n=10)

Intervention

Same-day concurrent training with HIIT before or after resistance training, vs resistance training only; 3 d/wk for 9 weeks

Findings

After 9 weeks, all groups improved leg-press 1RM and lean mass similarly regardless of whether HIIT preceded or followed resistance training. However, performing HIIT after resistance training slightly attenuated jump displacement, force and power compared with resistance training alone.

Outcome measures

Leg press 1RM, countermovement jump variables, body composition, VO2peak, aerobic power, lactate threshold

Limitations

Small sample per arm (n=9-10), men only, moderately active participants, 9-week duration, no female data.

Original source

DOI: 10.1371/journal.pone.0233134 · PMID: 32407361