Key result
Total physical activity volume is linked to slightly lower metabolic risk than MVPA minutes alone.
Why the study?
Associations between physical activity intensity and volume and adolescents' cardiometabolic health have important research, policy, and practice implications.
Does physical activity volume (total activity counts) improve cardiometabolic risk factors compared to moderate-to-vigorous physical activity minutes in U.S. adolescents?
Cross-Sectional (n=2,105)
Yes
Does physical activity volume (total activity counts) improve cardiometabolic risk factors compared to moderate-to-vigorous physical activity minutes in U.S. adolescents?
Total physical activity volume may be as important or slightly more important than moderate-to-vigorous physical activity minutes for improving cardiometabolic risk profiles in adolescents.
TAC was associated with cardiometabolic risk similarly or slightly more strongly than MVPA; hypothesis-generating for volume-based metrics in adolescent guidelines.
BACKGROUND: Associations between physical activity (PA) intensity and volume and adolescents' cardiometabolic health have research, policy, and practice implications. This study compares associations between cardiometabolic risk factors and 1) moderate-to-vigorous PA (MVPA) minutes versus total PA volume (accelerometer-derived total activity counts, TAC) and 2) light PA volume (counts at light intensity, L-TAC) versus moderate-to-vigorous PA volume (counts at moderate-to-vigorous intensity, MV-TAC). METHODS: 2105 adolescents from 2003- 2006 NHANES were included. Independent variables were MVPA minutes, TAC, L-TAC, and MV-TAC. Regression models tested associations between PA variables and continuous metabolic risk index (CMRI), waist circumference, systolic and diastolic blood pressure, HDL, insulin, and triglycerides. RESULTS: TAC demonstrated a slightly stronger inverse association with CMRI (P = .004) than did MVPA (P = .013). TAC and MVPA were both associated with systolic and diastolic pressure, HDL, and insulin; associations were similar or slightly stronger for TAC. L-TAC and MV-TAC were both associated with CMRI and HDL. Only L-TAC was associated with diastolic pressure. Only MV-TAC was associated with waist circumference, systolic pressure, and insulin. CONCLUSIONS: Compared with MVPA minutes, TAC demonstrates similar or slightly stronger associations with cardiometabolic risk factors. L-TAC and MV-TAC appear similarly associated with adolescents' clustered risk but differently associated with individual risk factors.
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Hatfield et al. (2014) conducted a cross-sectional in Cardiometabolic risk (n=2,105). Total activity counts (TAC) vs. Moderate-to-vigorous physical activity (MVPA) minutes was evaluated on Continuous metabolic risk index (CMRI) (p=0.004). Total physical activity volume (TAC) demonstrated a slightly stronger inverse association with continuous metabolic risk index (P = .004) compared to moderate-to-vigorous physical activity minutes (P = .013).
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