sentence: There's a personal trainer in a pink tank top and black athletic shorts standing a gym with many dumbbells, barbells and basketballs behind her. sentence:  There are also some other gym equipment behind her. sentence:  She is talking about how to use the equipment. sentence:  The personal trainer is using an exercise bicycle and peddling the cycle very vigorously. sentence:  There a few other women who are also biking the stationary bikes. sentence:  Then the personal trainer begins exercising using a pair of dumbbells. sentence:  She also does some sit-ups as she holds the dumbbells in her hands. sentence:  She then goes back on the bike and peddles steadily. sentence:  Then she does some stomach crunches while laying on the ground. sentence:  Then she holds the two dumbbells in her hands as she does some forward lunges. sentence:  She continues on her exercise bike at a steady speed.