Participation in muscle strengthening activities is a less examined component of public health physical activity guidelines for children and youth compared to participation in physical activity. In part, the lack of focus on strength is associated with the difficultly of measuring strength activities during participation. The aim of this pilot study was to develop and provide evidence of the concurrent and predictive validity of the Strength Observation during Vaulting (SOV) tool. Six female youth (4 with a disability and 2 without a disability) ranging in age from 11 - 22 years (Mage = 14.2 y, SD = 4.0) participating in a 5-day inclusive equestrian vaulting camp were recruited. Participants completed three measures of strength, and video of vaulters engaging in camp activities was coded using the System for Observing Fitness Instruction Time (SOFIT) and SOV tools. From a linear regression model (significant p = .020), the three measures of strength accounted for 98.7% of the shared variance with time spent in SOV levels 4 and 5. Bivariate correlation coefficients comparing SOV levels 4 and 5 and moderate-vigorous physical activity (MVPA) from SOFIT were r = .73 for all contexts, r = .89 for floor-work, r = .64 for barrel vaulting, r = .76 for horse vaulting, and r = .81 for stable chores. The predictive and concurrent validity of the SOV tool was more than adequate. Based on these results, the systematic observation is a feasible approach to assess engagement in strength activities during vaulting.

Cowichan Therapeutic Riding Association 1843 Tzouhalem Road Duncan British Columbia Canada

School of Exercise Science Physical and Health Education University of Victoria Victoria British Columbia Canada

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