Kim Kardashian's trainer shares a 5-minute workout you can do anywhere to build muscle and burn fat

Senada Greca.

Courtesy of Senada Greca

• Kim Kardashian's trainer Senada Greca said strength training is the key to an athletic physique.
• Greca said exercise transformed her physical and mental health, and helps build confidence.
• Her go-to workout includes lunges, planks, and "superwoman" moves to build full-body muscle.

When I talk to Senada Greca, she's gearing up to hit the gym with Kim Kardashian: household name, noted entrepreneur — and, apparently, an absolute beast at strength training.