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

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.

Efeito da cafeína sobre a performance no treinamento intervalado de alta intensidade

“…Em outro estudo, Ferreira et al (2019) avaliaram parâmetros de gasto energético e composição corporal antes e após um período de 2 semanas de treinamento HIIT em bicicleta, com frequência de treino de 3 vezes na semana em dias não consecutivos. Durante a sessão de treino não foi observada diferenças significativas no custo energético entre os grupos (CAF e PLA), porém no período de 45 minutos imediatamente após a sessão de treino o custo energético foi superior em 19,7% no grupo CAF quando comparado do grupo PLA.…”

Caffeine intake reduces sedentary time and increases physical activity predisposition in obese police officers

“…An acute reduction in sedentary time caused by caffeine ingestion has the potential to reduce cardiometabolic risk ( 4 , 5 ). Although the effects of chronic caffeine intake on cardiometabolic risk have not been investigated, studies have demonstrated that increased consumption of food containing caffeine reduces cardiometabolic risk ( 18 ). Specifically, coffee intake is associated with low cardiometabolic risks such as obesity, metabolic syndrome, and type 2 diabetes ( 19 ), but direct comparison between caffeine and coffee intake is difficult because coffee contains other substances that may reduce energy intake.…”