The belts used by the track and field event athletes are for spine and back support. The throwing events usually cause wear and tear of muscle leading to pain. The belts come in handy for healing back pain too.
The belts that are popularly used by throwing event athletes are -
Leather Lumbar Belts: The athletes commonly use this belt. It has a belt strap to secure the back and has buckles for adjustment.
Normal Lumbar Belts: These belts have double straps with Velcro grips. The material used in this are made of breathable material providing flexibility yet are sturdy.
As per IAAF, there are no specified criteria for belts. The athletes can pick any belts at their convenience.
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