Cassandra Bodlak, health coach at Studio Fitness, recommends her clients do a slight modification that's a little more challenging: when in elbow plank. Read to find out the small change that can make major results.
DIY concrete fire pit bowl from eHow. Summary: Make sand 'hill' in size you want bowl to be and, using a trowel, cover sand with layers of concrete, smooth a flat bottom to sit it on and vent holes, letting dry slowly under plastic sheet. Invert when dry.