A trainer in a gym takes a black dumbbell with one hand and shows his students how to properly pump their biceps to avoid injury.
Schlüsselwörter
dumbbell,
bodybuilding,
gym,
muscle,
bicep,
triceps,
physical activity,
sport,
healthy lifestyle,
balance,
weight,
athlete,
fitness centre,
motivation,
warmup,
sports equipment,
personal trainer,
massa,
weight training,
intensity
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