2x Former Figure Olympia Erin Stern Shares The Hollow Body Plank For ‘Smaller & Tighter Waist’
Erin Stern has sculpted her body carefully into a work of art…
Mastering Proper Plank Form for Total Core Engagement
In general, there are two ways to do any exercise – the…
Hollow Body Plank: Engage Your Core and Build Strength
A form of isometric exercise, planks are one of the most popular…
