Publication: The repeated bout effect of traditional resistance exercises on running performance across three bouts

Doma, Kenji, Schumann, Moritz, Leicht, Anthony, Heilbronn, Brian, Damas, Felipe, and Burt, Dean (2017) The repeated bout effect of traditional resistance exercises on running performance across three bouts. Applied Physiology, Nutrition and Metabolism, In press. pp. 1-29. (In Press)

https://researchonline.jcu.edu.au/49494/

Abstract
Purpose This study investigated the repeated bout effect of three typical lower-body resistance training (RT) sessions on maximal and sub-maximal effort running performance. Methods Twelve resistance-untrained men (age 24±4 years; height 1.81±0.10 m; body mass 79.3±10.9 kg; VO2peak 48.2±6.5 mL∙kg-1∙min-1; six-repetition maximum squat 71.7±12.2kg) undertook three bouts of RT sessions at six-repetition maximum. Counter-movement-jump (CMJ), lower-body ROM, muscle soreness and creatine kinase (CK) were examined prior to (T0), immediately-post (T1), 24 (T24) and 48 (T48) h post each RT bout. Sub-maximal (i.e. below anaerobic threshold [AT]) and maximal (i.e. above AT) running performance were also conducted at T24 and T48. Results Most indirect muscle damage markers (i.e., CMJ, ROM and muscle soreness) and sub-maximal running performance were significantly improved (P < 0.05; 1.9%) following the third RT bout compared to the second bout. Whilst maximal running performance was also improved following the third bout (P < 0.05; 9.8%) compared to other bouts, the measures were still reduced by 12-20% vs. baseline. However, the increase in CK was attenuated following the second bout (P < 0.05) with no further protection following the third bout (P > 0.05). Conclusions The initial bout induced the greatest change in CK, however at least two bouts were required to produce protective effects on other indirect muscle damage markers and sub-maximal running performance measures. This suggests that sub-maximal running sessions should be avoided for at least 48 hours post RT until the third bout, although a greater recovery period may be required for maximal running sessions.