Comparison of High Intensity versus High Volume Resistance Training on the BDNF Response to Exercise

This study compared the acute and chronic response of circulating plasma brain-derived neurotrophic factor (BDNF) to high-intensity low-volume (HI) and low-intensity high volume (HV) resistance training. Twenty experienced resistance trained men (23.5±2.6 y, 1.79±0.05 m, 75.7±13.8 kg) volunteered for this study. Prior to the resistance training program (PRE), participants performed an acute bout of exercise using either the HI (3-5 reps 90% of one repetition maximum [1RM]) or HV (10-12 reps 70% 1RM) training paradigm. The acute exercise protocol was repeated following 7-weeks of training (POST). Blood samples were obtained at rest (BL), immediately- (IP), 30-min (30P) and 60-min (60P) post exercise at PRE and POST. A 3-way repeated measure ANOVA was used to analyze acute changes in BDNF concentrations during HI and HV resistance exercise at PRE and POST. No training x time x group interaction in BDNF was noted (p=0.994). Significant main effects for training (p=0.050) and time (p<0.001) in BDNF were observed. Significant elevations in BDNF concentrations were seen from BL at IP (p=0.001), 30P (p<0.001), and 60P (p<0.001) in both HI and HV combined during PRE and POST. BDNF concentrations were also observed to increase from PRE to POST when collapsed across groups and time. No significant group x training interaction (p=0.342), training (p=0.105), or group (p=0.238) effect were noted in the BDNF area under the curve response. Results indicate BDNF concentrations are increased after an acute bout of resistance exercise, regardless of training paradigm, and are further increased during a 7-week training program in experienced lifters.

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