In backstroke, the arms contribute most of the forward movement. The arm stroke consists of two main parts: the power phase (consisting of three separate parts) and the recovery. The arms alternate so that always one arm is underwater while the other arm is recovering. One complete arm turn is considered one cycle.
Marijuana is not considered useful for treating petit mal or absence seizures and may even worsen them. Some patients find that marijuana works in conjunction with other drugs they are taking. Others find that marijuana works best for them when it is used without other drugs.
Anecdotal evidence of the power of cannabis to treat seizure disorders and epilepsy have been available for literally thousands of years. Studies conducted since the mid-1970s have found that THC and CBD, the primary cannabinoids in cannabis, deliver anticonvulsant and other valuable effects to epilepsy patients.