Jake Gyllenhaal: Boxing Training Day!

Jake Gyllenhaal carries a leather duffel bag while entering a boxing gym on Thursday (May 12) in Los Angeles.

The 30-year-old actor rocked a pair of Ray Ban aviators before working out at the gym.

Earlier in the week, Jake was spotted heading into an office building after exercising at the gym.

Jake has been busy filming scenes for his latest film, End of Watch, which is expected to hit theaters next year.

10+ pictures inside of Jake Gyllenhaal entering the gym…