Many endurance athletes believe strength training has no place in their weekly training schedule. Myths run amok that lifting weights will make them big and bulky or lead to injury. Contrary to popular belief, hitting the gym a couple times a week can lead to significant gains in endurance performance. Here's why:
References:
Leveritt, M., Abernethy, P. J., Barry, B. K., & Logan, P. A. (1999). Concurrent strength and endurance training. Sports medicine, 28(6), 413-427.
Baechle, T. R., & Earle, R. W. (2008). Essentials of strength training and conditioning. Human kinetics.
Wilson, J. M., Marin, P. J., Rhea, M. R., Wilson, S. M., Loenneke, J. P., & Anderson, J. C. (2012). Concurrent training: a meta-analysis examining interference of aerobic and resistance exercises. The Journal of Strength & Conditioning Research, 26(8), 2293-2307.
Hansen, E. A., Rønnestad, B. R., Vegge, G., & Raastad, T. (2012). Cyclists' improvement of pedaling efficacy and performance after heavy strength training.
Zupan, M. F., & Petosa, P. S. (1995). Aerobic and Resistance Cross-Training for Peak Triathlon Performance. Strength & Conditioning Journal,17(5), 7-12.