The most common though that I see in BJJ is the cervical sprain or strain. The cervical spine is the most mobile segment of the spine however it puts it at a high risk of injury. Cervical sprains/strains are soft tissue injuries. A strain is linked to muscle, while a sprain is linked to tendons.
However, for some people, effects are much shorter and they have to take modafinil 2X per day (albeit this is not that common). For other people, effects can last 20-24 hours. It all depends on how your body processes it.
Immediate release versions of Adderall last for 4-6 hours and require repeated dosing. Extended release Adderall XR lasts a full 12 hours but should be taken ONLY ONCE every 24 hours. More here on how Adderall affects the body and brain, and how long its effects last.he effects of immediate release Adderall last anywhere for 4-6 hours. Tablets usually last about 6 hours, and should not be taken more frequently. Adderall XRâs effects will last a full 12 hours.