DIGITAL CONSTANT POWER CROSS TENSILE STRENGTH TRAINING AND TESTING SYSTEM DIGITAL CONSTANT POWER DEEP-SQUAT TRAINING AND TESTING SYSTEM DIGITAL CONSTANT POWER HIGH-TENSILE STRENGTH BACK-MUSCLE TRAINING AND TESTING SY DIGITAL CONSTANT POWER SEAT-TYPE LEG STRETCH STRENGTH TRAINING AND TESTING SYSTE DIGITAL CONSTANT POWER SEAT-TYPE LEG TREAD POWER TRAINING AND TESTING SYSTEM DIGITAL CONSTANT POWER HIGH-LOW TENSILE STRENGTH TRAINING AND TESTING SYSTEM DIGITAL CONSTANT POWER MINIATURE MULTIFUNCTIONAL TRAINING AND TESTING SYSTEM DIGITAL ISODYNAMIC RACING BOAT TRAINING AND TESTING SYSTEM DIGITAL CONSTANT POWER WAIST TORSION STRENGTH TRAINING AND TESTING SYSTEM DIGITAL CONSTANT POWER SYNTHETIC TRAINING AND TESTING SYSTEM