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.
How Long Does Adderall Stay in Your System? Quick Overview Adderall has a half life of 9 to 14 hours, which means that 9 to 14 hours after dosage, only half of the drug remains in your body. Adderall will completely clear of your system in 3 days. However, this can vary based on several factors. Testing for Adderall can be done through urine, hair, saliva and blood. 1  In urine, Adderall can be detected for up to 4 to 7 days. 2  In hair, Adderall can be detected about a week after use for for up to 90 days. 3  In saliva, Adderall can be detected 20 minutes after use and can be detected for up to 48 hours.