muscular trainer doing variations of plank exercise on gym grass floor

Healthcare, Health, Online, Working, Wellness, Exercise, Strength, Person, Body, Networking, Performance, Athlete, Effort, Gym, Workout, Muscle, Determination, Fitness, Strong, Muscular, Male, Course, Professional, Powerful, Routine, Horizontal, Sport, Trainer, Slim, Wellbeing, Coach, Instructor, Bodycare, Physical, Motivation, Loss, Stretch, Warming, Masculine, Teach, Lesson, Class, Classroom, Hispanic, Abdominal, Explaining, Abs, Guidance, Improvement