Cycle ergometer high‑intensity interval training does not produce a transient risk of falling in adults 50–70 years of age

Abstract

Purpose High-intensity interval training (HIIT) is an exercise routine that induces positive physiological adaptations. However, research has stated that HIIT may elicit a fall risk. Therefore, does a single session of cycle ergometer HIIT negatively affect postural control differently from that of metabolically matched moderate-intensity continuous training (MICT)? Methods Twenty adults participated in non-weight-bearing cycling on two separate days, one HIIT and the other MICT. Prior to exercise, baseline measures of center-of-pressure (COP), gait, and dynamic balance were acquired. The same measures were captured at four (4) time points post-exercise (immediately, 10-, 20-, and 30-post). COP data were collected for double-leg eyes closed (EC) and single-leg eyes opened (SL) scenarios in two directions (anterior–posterior [AP] and medial–lateral [ML]). Results No significant differences for condition (HIIT vs MICT) or condition x time (pre, post, 10, 20, and 30) were observed Significant time effects for sway velocity in AP-SL (p=0.002) and ML-SL (p=0.023) and significant differences for time in sway range ML-EC (p=0.003) were observed. There was a significant effect for time in gait velocity (p=0.018). Conclusion A single session of cycle ergometer HIIT does not negatively affect postural control compared to a metabolically matched MICT protocol. HIIT does not impede postural control determined by COP data. Total work performed and individual training status may better indicate adverse changes in postural control variables in adults aged 50–70 years.