Original research| Volume 18, ISSUE 1, P103-108, January 2015

Warm-up with a weighted vest improves running performance via leg stiffness and running economy

Published:January 27, 2014DOI:



      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.


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


      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.


      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.


      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.


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