Nicholson, R. M., & Sleivert, G. G. (1999). Impact of concurrent resistance and endurance training upon distance running performance. Medicine and Science in Sports and Exercise, 31(5), Supplement abstract 1559.

The impact of concurrent resistance and endurance training on 10-km running performance in a simulated competitive situation was investigated. Runners (M = 19; F = 11) were matched and randomly assigned to an experimental (running and resistance) or control (running) group. Ss performed the same training program for 21 weeks, running from 5 to 8 times per week for 30 to 90 minutes at a heart rate intensity ranging from 75 to 95% of maximum. Resistance training involved 3 x 8 repetitions per exercise (intensity level of 8-RM), except for abdominals (15 repetitions). Testing occurred during weeks 3, 9, 15, and 21.

The resistance group improved significantly in running time (3.5%), VO2max, lactate threshold velocity, and upper and lower body strength. The running-only group improved in running time (2.2%) and lower body strength.

The addition of resistance training did not adversely affect the beneficial effects of running training. It added some extra fitness improvements and might be considered as a beneficial training addition for the basic preparatory phase of a running specialist's annual training plan or by individuals interested in a more generalized fitness program.

Implication. Resistance training does not interfere with running training improvements.

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