Jennifer Garner is in 'professional athlete' shape from cardio and strength training workouts, according to her trainer. Here's what she does.

• Actress Jennifer Garner does intense dance cardio and plyometrics workouts, her trainer told Shape.
• Trainer Beth Nicely considers Garner "a professional athlete" capable of advanced exercise.

Jennifer Garner's workouts are intense enough that her trainer considers her "a professional athlete," Shape reported.

The actress does advanced exercise routines with dance cardio, plyometrics, and weights, her trainer Beth Nicely told Shape.

"She's definitely someone that loves to show up and get a workout in and feel good," Nicely said.

Nicely shared an Instagram video of one of their workouts together, featuring synchronized steps and jumps in time to music. A typical routine will include a warm up and several rounds of similar dance cardio choreography, followed by weights, she said.

"Jen's dance background might make the moves look easy, but these circuits are advanced and she is very strong," Nicely said.

Garner affectionately refers to the more challenging workouts as "death by Beth," according to Shape.

One of Nicely's favorites is "The Circuit," which includes eight box jumps, 40 reps of jump roping, and 16 hops on a mini-trampoline with a 10-pound medicine ball, repeated for five sets.

Other HIIT-style workouts include single-leg jumps, box jump burpees, or weighted moves like squats to overhead presses and triceps rows.

Nicely's workouts are available in her digital fitness app, the Limit, which includes online classes.