1. this type of training says that consistent work will result in improved strength, work-capacity, flexibility, coordination, balance, core strength and mental toughness as well as promote weight loss. circuit sport-specific kettlebell functional

The answer is kettlebell. Kettlebells aren't anything new, but their popularity in fitness circles continues to rise—and with good reason. When used correctly, kettlebells are extremely effective training tools for providing total-body strength and conditioning. The problem is that kettlebells are often used improperly.