The AIR WALKER is a popular outdoor gym device that develops both lower and upper muscles. Perfect for rehabilitation because of the low impact on hip and leg joints, can help ease the strain on knee joints long term. Improves balance, coordination and flexibility. To do exercise grab the handle with your hands, stand on the steps. Use your leg muscles to move them forward and backwards. Keep your back upright. Differences in dimensions no more than +/- 5% are acceptable. All images are for illustration purpose only and may vary from the actual product.The Runner is a popular outdoor gym device that develops both lower and upper muscles. Perfect for rehabilitation because of the low impact on hip and leg joints, can help ease the strain on knee joints long term. Improves balance, coordination and flexibility. To do exercise grab the handle with your hands, stand on the steps. Use your leg muscles to move them forward and backwards. Keep your back upright. Differences in dimensions no more than +/- 5% are acceptable. All images are for illustration purpose only and may vary from the actual product.The Runner is a popular outdoor gym device that develops both lower and upper muscles. Perfect for rehabilitation because of the low impact on hip and leg joints, can help ease the strain on knee joints long term. Improves balance, coordination and flexibility. To do exercise grab the handle with your hands, stand on the steps. Use your leg muscles to move them forward and backwards. Keep your back upright. Differences in dimensions no more than +/- 5% are acceptable. All images are for illustration purpose only and may vary from the actual product.