This Aug. 6, 2010, file photo shows Jamaica's Usain Bolt after his 100m heat 1 at the IAAF Diamond League ‘DN Galan’ at the Stockholm Olympic Stadium in Stockholm, Sweden.
/ AP Photo/Maja Suslin/SCANPIX
MUNICH (AP) — Usain Bolt's manager says the Olympic track star is taking the rest of 2010 off because of tightness in his lower back.
Manager Ricky Simms says in an e-mail Tuesday that Bolt has been examined by a doctor in Germany and the back problem "restricts his ability to generate power in his stride." Simms says racing "in this condition could risk injury" to Bolt's legs.
Simms says an MRI exam showed that a previous Achilles' tendon injury is healed.
Bolt will have treatment to loosen his back and then rest, skipping track and field meets in Zurich and Brussels.
The announcement comes less than a week after Bolt lost to American rival Tyson Gay in the 100 meters at Stockholm.
Bolt owns world records in the 100 and 200.
Copyright 2010 The Associated Press.
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