One-strapping your backpack
While it may look cooler to some to one-strap it, the fact of the matter is that the resulting balancing act done by the other shoulder can lead to contractures and neck pain. If you’re someone who often carries a purse or gym back that only has one strap, try being mindful of what you have to carry in the bag to make it as light as you can. Shifting the load from shoulder to shoulder will also help out.