[Kayakers' length of training period lumbar segment mobility and weak links occurrence in biokinematics chain].

1) Sports training in kayaking causes reduced mobility of the lumbar spine and may cause weak links in the chain of biokinenatics connections and symptoms of LBP. 2) Gender and sports specialization does not differentiate canoeists because of LBP symptoms. The reasons for their occurrence can be ascribed to the use of weight training.