When it comes to how long you should hold a plank for, there is no definitive answer. It really depends on your fitness level and what your goals are. If you're just starting out, aim for holding a plank for 20-30 seconds. As you get stronger, you can increase the time to 1 minute or more. Ultimately, the key is to challenge yourself and progress slowly over time.
There are many benefits to holding a plank, including improved core strength, better posture, and reduced back pain. So if you're looking to improve your overall fitness and health, adding this simple exercise into your routine is a great way to do it!