Core and plyometric training for recreational marathon runners: effects on training variables, injury, and muscle damage
Core and plyometric training may reduce injury and enhance muscle function in some athletes, but the effects on recreational marathon runners are unknown. Thus, the purpose of this study was to compare the effects of plyometric or core training on injury, muscle damage, and training variables in marathon runners.
This study was a randomized-controlled trial. 34 subjects, ages 18–23 (20.7 ± 1.3) following the same marathon training program, were allocated to one of three groups for a weekly training session: core, plyometric, or no additional training (control). Subjects kept a training log throughout training. Outcomes were assessed during the 8-week run-in (RI) and 13-week marathon training (MT) periods. The plyometric and core training group subjects were assessed pre- and post-marathon for creatine kinase (CK), a marker of muscle damage.
The plyometric group did not change in any training variables between RI and MT. The core group increased in days missed due to injury (p = 0.003) and rate of perceived exertion (RPE) (p = 0.028). The control group increased in RPE (p = 0.010) and soreness (p = 0.010). The plyometric group had lower pre-marathon CK levels than the core group (81 ± 36 vs. 136 ± 59 U/L; p = 0.042). During MT, the plyometric group missed fewer days of training (plyometric: 1.7 ± 2.9; core: 4.2 ± 5.1; control: 4.5 ± 4.8) and missed fewer days due to injury (plyometric: 1.2 ± 2.6; core: 2.7 ± 5.1, control; 4.1 ± 4.9) but the differences were not significant.
A weekly plyometric training session may be superior to core or no additional training in improving training variables of recreational marathon runners.
KeywordsRunning Explosive training Concurrent training Creatine kinase Endurance exercise
No external funding was used to support this research.
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no competing interests.
This study and all procedures were in accordance with the ethical standards of the institution and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. It was approved by the Institutional Review Board at the University of Minnesota—Twin Cities.
All participants provided written, informed consent after being informed about the protocol and purpose of the study.
- 18.Kyrolainen H, Pullinen T, Candau R, Avela J, Huttunen P, Komi PV (200) Effects of marathon running on running economy and kinematics. Eur J Appl Physiol 82:297–304Google Scholar
- 20.Kim HJ, Lee YH, Kim CK (2009) Changes in serum cartilage oligomeric matrix protein (COMP), plasma CPK and plasma hs-CRP in relation to running distance in a marathon (42.195 km) and an ultra-marathon (200 km) race. Eur J Appl Physiol 105:765–770. https://doi.org/10.1007/s00421-008-0961-x CrossRefGoogle Scholar
- 24.Siegel AJ, Silverman LM, Lopez RE (1980) Creatine kinase elevations in marathon runners: relationship to training and competition. Yale J Biol Med 53:275–279Google Scholar
- 30.Chimera NJ, Swanik KA, Swanik CB, Straub SJ (2004) Effects of plyometric training on muscle-activation strategies and performance in female athletes. J Athl Train 39:24–31Google Scholar
- 35.Grant S, Aitchison T, Henderson E, Christie J, Zare S, McMurray J et al (1999) A comparison of the reproducibility and the sensitivity to change of visual analogue scales, borg scales, and likert scales in normal subjects during submaximal exercise. Chest 116:1208–1217. https://doi.org/10.1378/chest.116.5.1208 CrossRefGoogle Scholar
- 38.Borg G (1998) Borg’s perceived exertion and pain scales. Human Kinetics, ChampaignGoogle Scholar
- 40.Jamurtas AZ, Fatouros IG, Buckenmeyer P, Kokkinidis E, Taxildaris K, Kambas A et al (2000) Effects of plyometric exercise on muscle soreness and plasma creatine kinase levels and its comparison with eccentric and concentric exercise. J Strength Cond Res 14:68–74. https://doi.org/10.1519/00124278-200002000-00012 Google Scholar