Greetings. In the recent days I have noticed that endurance of both of my hands, left hand especially, decreased. After 1-2 minutes of playing I have to take a break for a few minutes for my hands to recover. I suspect that this happened because a little over a week ago I increased my practice time from 3-4 hours every day to 4.5-5 hours, since I am preparing for the entrance exams to the music school. I practice 6 days a weak with this regime and leave one day for rest on which I don't play the bass at all. I asked for advices on restoring my endurance on the double bass subreddit and received many messages that if I continue with this practice regime I could get carpal tunnel syndrome or various other arm injuries. For this time I took a break from double bass for one day to let my hands recover, but I can't afford to make this regulary or to decrease my practice time significantly as I don't have much time left before the exams, so I wanted to ask here for advices/exercices to both protect my hands from injury, and quickly restore hands endurance.
My background for context:
I started playing Double Bass in December of the last year and before that I played Electric Bass for year and a half. When I started I practiced for about 30 minutes a day and gradually increased my practice time. In February I practiced for about 2 hours, and in March-April - about 3-4. During practice I monitor how I feel and take short breaks whenever I start feeling tension so as not to overstress myself. I also split my practice time and practice for no more that an hour at a time and after that I take break for at least an hour before playing again. Regarding the technique I try to keep everything relaxed in both of my hands. To do so in left hand I try press strings against the fingerboard with a combined effort of flexing my finger and pulling back from a shoulder a bit instead of squeezing the fist. It allows me to use very little effort to press string down and also leaves the rest of my hand, especially thumb, relaxed.
Thanks in advance.
My background for context:
I started playing Double Bass in December of the last year and before that I played Electric Bass for year and a half. When I started I practiced for about 30 minutes a day and gradually increased my practice time. In February I practiced for about 2 hours, and in March-April - about 3-4. During practice I monitor how I feel and take short breaks whenever I start feeling tension so as not to overstress myself. I also split my practice time and practice for no more that an hour at a time and after that I take break for at least an hour before playing again. Regarding the technique I try to keep everything relaxed in both of my hands. To do so in left hand I try press strings against the fingerboard with a combined effort of flexing my finger and pulling back from a shoulder a bit instead of squeezing the fist. It allows me to use very little effort to press string down and also leaves the rest of my hand, especially thumb, relaxed.
Thanks in advance.