I can speak for myself as I play Test cricket quite often. The breaks between sessions are extremely effective. During those 20 minutes, the players can not only rest, but also build team spirit, which is described in great detail in this link. This is an article from FantasyHero, which is directly related to cricket. Even more, they rely on reputable sources and years of research. Every player uses this time in a different way, but the effect is the same for all - it is the willingness to go all out to win.