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Maximal strength, power, and aerobic endurance adaptations to concurrent strength and sprint interval training Gregory S. Cantrell, Brian K. Schilling, Max R. Paquette & Zsolt Murlasits
European Journal of Applied Physiology ISSN 1439-6319 Eur J Appl Physiol DOI 10.1007/s00421-013-2811-8
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Author's personal copy Eur J Appl Physiol DOI 10.1007/s00421-013-2811-8
Original Article
Maximal strength, power, and aerobic endurance adaptations to concurrent strength and sprint interval training Gregory S. Cantrell · Brian K. Schilling · Max R. Paquette · Zsolt Murlasits
Abstract Purpose This study was designed to examine whether concurrent sprint interval and strength training (CT) would result in compromised strength development when compared to strength training (ST) alone. In addition, maximal oxygen consumption (VO2max) and time to exhaustion (TTE) were measured to determine if sprint interval training (SIT) would augment aerobic performance. Methods Fourteen recreationally active men completed the study. ST (n = 7) was performed 2 days/week and CT (n = 7) was performed 4 days/week for 12 weeks. CT was separated by 24 h to reduce the influence of acute fatigue. Body composition was analyzed pre- and post-intervention. Anaerobic power, one-repetition maximum (1RM) lowerand upper-body strength, VO2max and TTE were analyzed pre-, mid-, and post-training. Training intensity for ST was set at 85 % 1RM and SIT trained using a modified Wingate protocol, adjusted to 20 s. Results Upper- and lower-body strength improved significantly after training (p 0.05). VO2max increased 40.9 ± 8.4 to 42.3 ± 7.1 ml/kg/min (p 0.05). A significant time effect was observed in maximal lower-body (p 8 mmol/l, measured via finger stick, and expressed an RPE value ≥18. No significant differences were observed between ST and CT in pre-training TTE and VO2max values. No significant interaction (group × time) was observed (p = 0.069). A significant time main effect was observed in TTE (p = 0.021). TTE increased from pre- to post-test (10.46 ± 1.3 to 11.25 ± 1.2 min; p = 0.026; ES = 0.66) and mid- to post-test (10.86 ± 1.05 to 11.25 ± 1.24 min; p = 0.046; ES = 0.35). A significant group main effect was observed in TTE (ST: 10.22 ± 0.69 vs. CT: 11.50 ± 1.16; p = 0.016; ES = 2.13). TTE values for both ST and CT are presented in Table 3. A significant interaction (time × training) effect was observed in VO2max (p = 0.043). VO2max increased significantly from pre- to post-testing for CT (40.9 ± 8.4 to
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Author's personal copy
Eur J Appl Physiol
Table 3 Time to exhaustion values during graded exercise test Group
Pre-test
Mid-test
Post-test
ST
10.2 ± 0.7
10.1 ± 0.5
10.4 ± 0.9
CT
10.7 ± 1.7
11.6 ± 0.9
12.1 ± 0.9
Values presented as mean ± SD (min) CT concurrent training, ST strength training
46.0
∗∗
Discussion
VO 2 max (ml/kg/min)
44.0 42.0 40.0
∗
38.0
ST CT
36.0 34.0 32.0 Pre
Mid
Post
Fig. 1 Mean (with standard error) VO2max for ST and CT. ST strength training, CT concurrent training. *Significant difference between groups p
