Does caffeine ingestion before a short-term sprint interval training promote body fat loss?

Braz J Med Biol Res. 2019 Dec 5;52(12):e9169. doi: 10.1590/1414-431X20199169. eCollection 2019.

Abstract

We investigated the effect of caffeine ingestion combined with a 2-wk sprint interval training (SIT) on training-induced reductions in body adiposity. Twenty physically-active men ingested either 5 mg/kg of cellulose as a placebo (PLA, n=10) or 5 mg/kg of caffeine (CAF, n=10) 60 min before each SIT session (13×30 s sprint/15 s of rest). Body mass and skinfold thickness were measured pre- and post-training. Energy expenditure was measured at rest, during exercise, and 45 min after exercise in the first SIT session. Body fat was similar between PLA and CAF groups at pre-training (P>0.05). However, there was a significant decrease in body fat after training in the CAF group (-5.9±4.2%, P<0.05) but not in PLA (1.5±8.0%, P>0.05). There was no difference in energy expenditure at rest and during exercise between PLA and CAF groups (P>0.05), but the post-exercise energy expenditure was 18.3±21.4% greater in the CAF than in the PLA group (P<0.05). In conclusion, caffeine ingestion before SIT sessions induced a body fat loss that may be associated with higher post-exercise energy expenditure.

MeSH terms

  • Adipose Tissue / drug effects*
  • Adult
  • Caffeine / administration & dosage*
  • Double-Blind Method
  • Energy Metabolism / drug effects*
  • High-Intensity Interval Training*
  • Humans
  • Male
  • Oxygen Consumption / drug effects*
  • Young Adult

Substances

  • Caffeine