Acute Demands and Recovery From Common Interval Training Protocols.

Area of Science:

• Exercise Physiology
• Sports Science
• Training Methodology

Background:

• Interval training protocols lack standardized classification, leading to ambiguity in workload and recovery parameters.
• Limited understanding exists regarding the distinct training loads and recovery responses across common interval training methods.

Purpose of the Study:

• To compare the acute physiological demands and perceived exertion of three distinct interval training protocols against a moderate, continuous exercise session.
• To identify differences in metabolic responses and recovery metrics among various interval training structures.

Main Methods:

• Eight participants completed randomized cycle ergometer sessions: 30s work/4min rest, 1min work/1min rest, 4min work/3min rest, and a 45min continuous session.
• Measured variables included oxygen consumption (V̇o2), heart rate (HR), peak blood lactate, Training Impulse (TRIMP), session Rating of Perceived Exertion (sRPE), and RPE-Training Load.
• Physiological and perceptual data were collected during exercise and for 30 minutes post-exercise recovery.

Main Results:

• Significant differences were observed across protocols for average V̇o2, total O2 consumption, peak lactate, TRIMP, sRPE, and RPE-Training Load.
• No significant differences were found in peak V̇o2 or peak HR between interval protocols, nor in V̇o2 or HR during recovery.
• Higher blood lactate levels post-recovery were noted for the 30s/4min protocol compared to the 4min/3min protocol and continuous session.

Conclusions:

• Common interval training protocols elicit a spectrum of acute physiological and perceptual responses.
• These variations necessitate careful consideration when designing training interventions or interpreting exercise science research.
• The findings highlight the importance of protocol specificity in interval training prescription.