Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Frequency of studies published on the effect of caffeine on strength performance according to the use (or not) of a body-mass adjusted dose of caffeine (a), a combination of caffeine with other substances (b), whether a relationship with other co-ingested substances (c), employed a placebo-controlled situation (d), reported participants’ habitual caffeine consumption (e), and reported caffeine-associated side effects (f).
