Warm-up With a Weighted Vest Improves Running Performance via Leg Stiffness and Running Economy

J Sci Med Sport. 2015 Jan;18(1):103-8. doi: 10.1016/j.jsams.2013.12.005. Epub 2014 Jan 2.

Abstract

Objectives: To determine the effects of "strides" with a weighted-vest during a warm-up on endurance performance and its potential neuromuscular and metabolic mediators. A bout of resistance exercise can enhance subsequent high-intensity performance, but little is known about such priming exercise for endurance performance.

Design: A crossover with 5-7 days between an experimental and control trial was performed by 11 well-trained distance runners.

Methods: Each trial was preceded by a warm-up consisting of a 10-min self-paced jog, a 5-min submaximal run to determine running economy, and six 10-s strides with or without a weighted-vest (20% of body mass). After a 10-min recovery period, runners performed a series of jumps to determine leg stiffness and other neuromuscular characteristics, another 5-min submaximal run, and an incremental treadmill test to determine peak running speed. Clinical and non-clinical forms of magnitude-based inference were used to assess outcomes. Correlations and linear regression were used to assess relationships between performance and underlying measures.

Results: The weighted-vest condition resulted in a very-large enhancement of peak running speed (2.9%; 90% confidence limits ±0.8%), a moderate increase in leg stiffness (20.4%; ±4.2%) and a large improvement in running economy (6.0%; ±1.6%); there were also small-moderate clear reductions in cardiorespiratory measures. Relationships between change scores showed that changes in leg stiffness could explain all the improvements in performance and economy.

Conclusions: Strides with a weighted-vest have a priming effect on leg stiffness and running economy. It is postulated the associated major effect on peak treadmill running speed will translate into enhancement of competitive endurance performance.

Keywords: Neuromuscular characteristics; Priming; Running economy; Running performance; Stiffness; Warm-up.

Publication types

  • Clinical Study

MeSH terms

  • Adult
  • Athletic Performance / physiology*
  • Cross-Over Studies
  • Exercise Test
  • Heart Rate
  • Humans
  • Leg / physiology
  • Male
  • Oxygen Consumption
  • Pulmonary Gas Exchange
  • Pulmonary Ventilation
  • Random Allocation
  • Running / physiology*
  • Sports Equipment*
  • Warm-Up Exercise / physiology*