Everett Ray Hutsell appeals from the district court’s 1 judgmеnt affirming the Secretary of Health and Human Services’ decision denying his application for disability insurance benefits. We affirm.
I.
Hutsell filed an application for benefits in November 1984 alleging disability since May 1984 due to а back impairment. His application was denied but the district court remanded for reevaluation of Hut-sell’s subjective complaints of pain. A supplemental hearing was held on November 20, 1986, before a different administrative law judge (AU), who issued a decision on December 23, 1986. The AU found that Hutsell’s subjective complaints were not fully credible and that he retained the capacity to perform the full range of light work. The AU thеn applied the Medical-Vocational Guidelines (the “grid”), finding that Rules 202.16 and 202.17 directed a conclusion that Hutsell was not disabled. See 20 C.F.R. Pt. 404, Subpt. P, App. 2, table 2 (1989). The appeals council denied Hutsell’s request for review, making thе AU’s decision the final decision of the Secretary.
At the time of the AU’s decision, Hutsell was forty-eight years old. He has a third grade education and worked in the past as a welder. In December 1979, Hutsell underwent back surgеry for a ruptured disc. He had lumbar disc surgery again in August 1981 after he reinjured his back. After each surgery, Hutsell eventually returned to work with his treating physician’s approval. Hutsell injured his back for a third time in May 1984 and stopped working in July. He was hospitalized for epidural blocks and released a few weeks later in August 1984 after much improvement from physical therapy. Complaining of lower back pain, Hutsell continued to be seen by his treating and other physicians up to mid-January 1985. The record indicates that he was not treated by a physician after that date. In November 1984, Hutsell was examined by an orthopedic specialist, who concluded that Hutsеll had status post-operative laminectomy syndrome with residual radiculopathy on the left side and persistent limitation of motion and stiffness of the lumbar spine. He felt Hutsell’s healing period had ended and saw no reason to consider additional surgical procedures.
Beginning in July 1986 and continuing at least up to the date of the supplemental hearing, Hutsell worked on a building demolition crew for a salvage yard operator. His work included prying boards loose with a crowbar and picking up bricks. His employer testified that he was a good worker. Hutsell worked at this job on a consistent part-time basis but there were several weeks in which he worked forty hours.
In light of this employment, the district court concluded that Hutsell had failed to show he was not currently engaged in substantial gainful activity, and affirmed the Secretary’s decision on that ground. Hut-sell argues that his work activity since July 1986 was too sporadic to constitute substantial gainful activity. We do not address this issue because, as the Secretary correctly notes, the AU did not specifically find that Hutsell had engaged in substantial gainful activity between July 1986 and the date of decision.
II.
Our review is limited to determining whether there is substantial evidence on
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the record as a whole to support the Secretary’s decision.
See, e.g., Thomas v. Sullivan,
The AU determined that Hutsell suffered from residuals of back surgery and was unable to return to his past relevant work as a welder, which required acts at the heavy exertional level. Giving Hutsell “the benefit of a doubt,” the AU found that he had been capable of performing the full range of light work since May 1984. The Secretary’s regulations define “light work” as follows:
Light work involves lifting no more than 20 pounds at a time with frequent lifting or carrying of objects weighing up to 10 pounds. Even though the weight lifted may be very little, a job is in this category whеn it requires a good deal of walking or standing, or when it involves sitting most of the time with some pushing and pulling of arm or leg controls. To be considered capable of performing a full or wide range of light work, you must have the ability to do substantially all of these activities.
20 C.F.R. § 404.1567(b) (1989).
There is certainly evidence in the record indicating that Hutsell’s back problems limited his ability to work, but taken as a whole, the record contains sufficient support for the AU’s finding that Hutsell’s impairment did not prevent him from performing the full range of light work. In particular, the weight of the medical evidence favors this finding. Assessments by the physicians of record concluded that Hutsell was able to engage in work activities consistent with the light exertional level. On July 25, 1985, Hutsell’s treating physician, Dr. Thomas I. Miller, who performed the two surgeries, wrote that he had released Hutsell “to light activities with restrictions of 25 pound weight lifting and no repeated bending.” This circuit “requires the AU to give substantial weight to the treating physician’s opinion in the evaluation process” when, as here, the opinion is supported by the evidence.
Turpin v. Bowen,
Hutsell contends that the AU failed to properly evaluate his subjective complaints of pain under the standаrds set forth in
Polaski v. Heckler,
The AU acknowledged that the burdеn shifted to the Secretary to prove jobs existed in the national economy which Hutsell was capable of performing. Hut-sell contends that vocational expert testimony was needed to satisfy this burden. Wе disagree. When a claimant’s subjective complaints of pain “are explicitly discredited for legally sufficient reasons articulated by the AU,” the Secretary’s burden may be met by use of the grid.
Long,
Finally, we believe the AU properly rejected the suggestion in Dr. Chaney’s vocаtional evaluation report that Hutsell was mentally retarded. 4 This is the only evidence of record indicating mental retardation. The AU found the possibility of such an impairment was totally inconsistent with Hutsell’s skilled work baсkground and the fact that in his welding job he had supervised as many as ten people. Fur *751 thermore, the AU noted that Hutsell displayed no signs of significant mental limitations at the hearing.
For the foregoing reasons, the judgment of the district court is affirmed.
Notes
. The Honorable Henry L. Jones, United States Magistrate for the Eastern District of Arkansas. Judgment was entered pursuant to Magistrate Jones’ memorandum and order.
.Hutsell testified that he had not refilled prescriptions for his two pain medications since July 1985 and March 1986, respectively, because he could not afford them. However, the record reveals that he was awarded a substantial workers’ compensation settlement in March 1986. The record also indicates that Hutsell was not treated by a physician after January 1985. As we noted in
Benskin,
. We note that under grid Rules 202.16 and 202.17, upon which the ALJ properly relied, it was not necessary to determine the validity of Hutsell's claim that he is functionally illiterate.
. The report stated that Hutsell has an approximate I.Q. of fifty-six based on the results of a Peabody Picture Vocabulary Test. We note that this test is not among the well-standardized psychological tests listed in the Secretary’s regulations concerning mental disorders. See 20 C.F.R. Pt. 404, Subpt. P, App. 1, § 12:00(D) (1989).
