Modified Side Plank – The Right Way SLOW & STEADY SERIES: Modified Side Plank for beginner level, mastered the slow and steady way! Targets side body obliques, core, arms and stabilising muscles. Try 8 reps each side and then build reps as you grow stronger and perfect your technique. Slow & Steady Wins The Race Previous Post The Ultimate Arthritis Diet Next Post Bird Dog Variation: Power up!