Claimant seeks review of a Workers’ Compensation Board (Board) order holding that his cervical spine condition is not compensable as a consequence of his compensable lower back strain. ORS 656.005(7)(a)(A). We affirm.
The material facts, as found by the Board, are as follows: In November 1993, claimant injured his back while he was using a pipe wrench at work. The insurer accepted a disabling low back strain on December 14, 1993. On December 29, Dr. Macha performed a laminotomy and discectomy on claimant. A few weeks after the surgery, Macha recommended that claimant begin a post-laminectomy flexibility and strengthening program and sent him to a physical therapist for exercise instruction. Claimant fell at work in February 1994 and exacerbated his low back strain. After claimant had recuperated, Macha advised him to resume his exercise program at home.
After performing a physical examination on April 8, 1994, Macha determined that claimant was medically stationary. Macha recommended that claimant keep his back and abdominal muscles conditioned, because he was at risk for recurrent back pain in the future. Claimant’s claim was closed by Determination Order on May 2, 1994. He was awarded temporary disability and 17 percent unscheduled permanent partial disability.
In early March 1995, claimant again suffered an exacerbation of his low back strain as a result of lifting 50 pound bags of concrete at work. Macha advised claimant not to work for a few days, prescribed some medication, and referred him to a physical therapist for four to six sessions of flexing and strengthening exercises. The physical therapist recommended a renewed exercise program, and claimant told the therapist that he could do the exercises at work. On March 13,1995, the physical therapist reported that all goals had been met and that claimant would be receiving no further physical therapy. On March 30,1995, Macha found that claimant’s condition had progressed to its pre-exacerbation status, but he advised claimant to continue his exercise program.
*627Claimant regularly performed his exercises, including abdominal “crunches,”1 at work before his shift started and during breaks. On August 17, 1995, claimant sought medical treatment for pain and stiffness in his cervical spine and for numbness in his hand. He reported to Macha that he had hyper-extended his neck while performing crunches as part of his exercise program.2 Macha diagnosed neck pain and a possible herniated disc. A cervical MRI scan showed minor cervical spondylosis at C6-7 with possible disc bulging, but there was no significant disc herniation.
On October 19, 1995, employer issued a partial denial of claimant’s cervical spine condition. Claimant requested a hearing on the denial and, after hearing, the administrative law judge (ALJ) set aside the denial. The ALJ concluded that the performance of the crunches was reasonable and necessary medical treatment that was integral to maintaining claimant’s recovery from his low back strain and, relying on our holding in Barrett Business Services v. Homes, 130 Or App 190, 881 P2d 816, rev den 320 Or 492 (1994), held that the cervical condition was compensable as a consequence of the low back strain pursuant to ORS 656.005(7)(a)(A).3
The Board reversed the ALJ, holding that the cervical condition was not a compensable consequential condition because it did not arise as a “direct result of reasonable and necessary medical treatment for a compensable' injury.” The Board explained:
*628“[W]e find the causal relationship in this case between claimant’s compensable low back injury and his cervical injury to be too tenuous and indirect to render the latter a compensable consequence of the former under ORS 656.005(7)(a)(A). Since claimant was doing his ‘abdominal crunch’ exercises on his own as a preventative measure, several months after claim closure and without any direct medical supervision, we conclude that claimant’s home exercise program does not constitute ‘medical treatment’ for his compensable low back injury for purposes of the Hames analysis.”
Claimant argues that the Board erred in concluding that his cervical injury did not result from reasonable and necessary treatment for his compensable injury and, consequently, in holding that the injury was not compensable under ORS 656.005(7)(a)(A). Claimant contends that the Board’s error resulted from its misapplication and misunderstanding of this court’s decision in Hames. He asserts that there is no significant distinction between the type of physical therapy that occurred in Hames, which we concluded was reasonable and necessary medical treatment, and the physical therapy that claimant was performing for his low back injury here.
We conclude that the Board did not err in holding that claimant’s cervical injury was not a compensable consequential injury under ORS 656.005(7)(a)(A). As we discussed in our decision in Hames, and later in Robinson v. Nabisco, Inc., 143 Or App 59, 923 P2d 668 (1996), rev allowed 325 Or 247 (1997), the legislature amended ORS 656.005(7)(a)(A) in 1990 to require that, in order for an injury or disease to be compensable as a “consequence” of a compensable injury, it must be proven that the compensable injury is the major contributing cause of the consequential condition. That amendment was a change from prior law under which a claimant could recover for injuries that would not have occurred “but for” the claimant’s compensable condition. Fenton v. SAIF, 87 Or App 78, 741 P2d 517, rev den 304 Or 311 (1987). We noted further, in both Hames and Robinson, however, that, in amending ORS 656.007(7)(a)(A), the legislature did not intend to change the law relating to the compensability of injuries occurring during reasonable and necessary medical *629treatment. We held that injuries occurring during reasonable and necessary medical treatment are considered a natural consequence of a compensable injury and, accordingly, the compensable injury is deemed to be the major contributing cause of the new condition. As we explained in Hames:
“[WJhere necessary and reasonable treatment of a compensable injury is the major contributing cause of a new injury, a distinction between the compensable injury and its treatment is artificial. In such instances, the compensable injury itself is properly deemed the ‘major contributing cause of the consequential condition.’ ORS 656.005(7)(a)(A).” 130 Or App at 196-97.
Claimant and the dissent believe that our decision in Hames is controlling here. In Hames, the claimant dislocated his shoulder at work. Because of that injury, the claimant’s shoulder was, necessarily, replaced in its joint and immobilized. Hames, 130 Or App at 192. That, in turn, caused the claimant to develop a condition commonly called “frozen shoulder.” To treat that condition, the surgeon prescribed “extremely aggressive” physical therapy to improve the range of shoulder motion. During the course of the physical therapy, which involved rigorous manipulation of claimant’s shoulder and arm, his right ulnar nerve was injured. We concluded that the ulnar injury resulted from reasonable and necessary medical treatment and, therefore, was a compensable consequential condition under ORS 656.005(7)(a)(A).
Claimant asserts that our decision in Hames is controlling here because there is no significant difference between the physical therapy in Hames and the activities that claimant was undertaking here. His view is that, similar to the physical therapy in Hames, claimant’s exercises here were reasonable and necessary medical treatment. As noted above, the Board concluded that claimant’s activities that resulted in this injury were not reasonable and necessary medical treatment. The Board gave two reasons for that conclusion. First, it stated that claimant did the exercises on his own without medical supervision. Second, the Board found that the exercises were not a curative treatment to aid claimant’s recovery but, rather, were a preventative measure.
*630Claimant argues that the reasons given by the Board do not support its conclusion that this was not reasonable and necessary medical treatment. We disagree. The fact that claimant did the exercises on his own and without direct medical supervision is not, in itself, determinative. As the dissent to the Board’s opinion correctly points out, there are numerous instances where medical treatment may occur without direct medical supervision. However, the fact that the exercises were not curative but, as found by the Board, were done solely as a preventative measure, supports the Board’s conclusion. At the time that claimant was injured dining these exercises, he had been found medically stationary by his doctor. The doctor stated that claimant had returned to his pre-exacerbation condition and claimant’s physical therapist had indicated some months earlier that no further physical therapy was necessary. Claimant was doing the exercises to remain conditioned in his back and abdomen in order to avoid future injuries. We agree with the Board that such activities do not constitute reasonable and necessary medical treatment for purposes of determining if the injury is a consequential condition of a compensable injury. The Board did not err in upholding employer’s denial of claimant’s claim for compensation for his cervical injury.
Affirmed.
Claimant described “crunches” as “laying [sic] on your back with your knees bent, and — and crunching up.”
Employer concedes that claimant’s performance of the “crunches” was the major cause of claimant’s cervical spine condition.
ORS 656.005(7)(a) provides, in part:
“A ‘compensable injury’ is an accidental injury, or accidental injury to prosthetic appliances, arising out of and in the course of employment requiring medical services or resulting in disability or death; an injury is accidental if the result is an accident, whether or not due to accidental means, if it is established by medical evidence supported by objective findings, subject to the following limitations:
“(A) No injury or disease is compensable as a consequence of a compensable injury unless the compensable injury is the major contributing cause of the consequential condition.”