Fulham have been in Costa Rica as they prepare for the 2013-14 campaign and Sidwell feels the Cottagers will benefit from their intensive pre-season regime.
"It's pre-season so we want to work as hard as we can and the more game time you get, the better it is for the start of the season when it comes," he told the club's official website.
"I think the trick [to reaching peak fitness] is more down to games - because we had three games in a week. We'll be back [at Motspur Park] soon to train hard and continue to work hard to build up our fitness.
"Obviously we've got the games [at Craven Cottage] when we're getting close to the start of the season and everyone should be in tip-top condition by then for the start against Sunderland away."
Sidwell was happy with his own performances last term but the midfielder admits he is keen to make amends after consecutive straight red cards towards the end of the season which resulted in suspensions totalling seven matches.
He added: "Last season, for me personally, it went well. Obviously towards the end the two back-to-back red cards were a big blow, not just for me, but for the team - I let myself down, I let everyone down.
"We didn't pick up points on that run either so I want to make up for the game time that I missed towards the end of the season. Hopefully I will this season."