Kayaking is bad for your back for the following two reasons –
-Non-ergonomic position or the traditional kayaking position.
-Even after a few hours of kayaking, if you fail to switch your current position.
The reason behind this is quite simple – the kayaking position is not inclined with your routine position. There are backrests and footrests in kayaking for maintaining the required kayaking position for safety of the adventure enthusiast. This body posture is strictly managed to prevent your body from falling either backwards or sliding forward.
Also, as you paddle for long hours, your legs are constantly pushing in a direction opposite to kayak’s footrest and your lumbar spine. This is from where the pressure arises, and you experience a backache.