Shoshana shows us a stagnate exercise to tone your core and work on balance.PHILADELPHIA (WPVI) -- Shoshana shows us a stagnate exercise to tone your core and work on balance.WATCH PREVIOUS FITNESS TIPS:Seated shoulder pressPlank hover Compound exercise to work lower and upper body Compound exercise with squat and arm pressOblique side crunch Strengthening your legs No equipment ab exercise Weighted crunch Report a correction or typo