Dist. Ct. did not err in upholding ALJ’s denial of claimant’s application for Social Security disability benefits based on claim that claimant’s scoliosis and degenerative disc disease prevented him from working, after ALJ found that claimant was able to perform light work. While ALJ failed to explain why he accepted one doctor’s assessment over others, record supported said doctor’s assessment indicating that claimant’s condition did not impose any restriction with respect to sitting, standing or walking necessary to perform light work. Moreover, ALJ adequately explained why he rejected claimant’s testimony regarding nature and extent of his condition. Ct. further noted that although there were other aspects of ALJ’s credibility determinations that lacked adequate explanation, claimant waived any arguments with respect to these arguments due to claimant’s failure to address them in Dist. Ct.