James E. Nearhood, Sr. appeals from an order of the Secretary of the Department of Public Welfare (DPW) which affirmed a decision of DPW’s Office of Hearings and Appeals (OHA) denying him benefits under the Act of December 8, *5611959, P.L. 1718, as amended, 61 P.S. § 951, commonly referred to as Act 534.1
Nearhood was employed at DPW’s Loysville Youth Development Center (LYDC),2 where he supervised delinquent minors. On June 14, 1992, Nearhood fell in the course of his employment and injured his lower back. The accident occurred when, upon hearing a student call out, Nearhood turned quickly and fell to the floor. Thereafter, DPW filed a notice of compensation payable and, on June 22, 1992, Near-hood began to receive workers’ compensation benefits.
Prior to the injury at issue in this case, Nearhood had sustained another work-related injury to his back and right knee when, on March 24, 1992, he attempted to restrain a student. As a result of that injury, Nearhood received workers’ compensation benefits from March 24, 1992 to April 13, 1992, when he returned to work. Nearhood also alleges that, on May 13, 1992, his back was injured when he attempted to restrain another student. Nearhood claims that he developed a lump on his back and experienced pain from that injury, although he continued to work until he was disabled by the June 14, 1992 injury.
Nearhood filed a request with DPW for full salary benefits under Act 534 which DPW denied on August 20, 1992. He appealed that decision and a hearing was conducted before a DPW hearing examiner. At the hearing, Nearhood argued that he was eligible for Act 534 benefits because (1) he was injured by a student, and (2) his June 14, 1992 injury was the *562result of his two prior injuries, which were both caused by students. The hearing examiner, however, determined that Nearhood was ineligible for Act 534 benefits and recommended to OHA that his appeal be dismissed. The hearing examiner rejected Nearhood’s argument that he was injured by a student and determined that he was injured by his own action of turning and falling. Further, the hearing examiner concluded that, even if Nearhood’s June 14, 1992 injury was related to his previous injuries, the June 14, 1992 injury was an aggravation of those injuries and, therefore, constituted a new injury not caused by the act of a student.
On March 25, 1993, OHA issued an order adopting the hearing examiner’s recommendation to deny benefits.3
On appeal, Nearhood contends that he is eligible for Act 534 benefits because (1) his injury was the result of an act of a student, and (2) because the June 14, 1992 injury was related to his two prior injuries which were both caused by students.
In Act 534, the General Assembly, recognizing the obvious physical hazards faced by employees who supervise potentially dangerous persons, provided full salary benefits to employees injured by those individuals. Hardiman v. Department of Public Welfare, 121 Pa.Commonwealth Ct. 120, 550 A.2d 590 (1988). Act 534 reads, in pertinent part:
Any employe of a State penal or correctional institution under the Bureau of Correction of the Department of Justice and any employe of a State mental hospital or Youth Development Center under the Department of Public Welfare, who is injured during the course of his employment by an act of any inmate____or by any person who has been committed to such institution ... shall be paid, by the Commonwealth of Pennsylvania, his fully salary, until the disability arising therefrom no longer prevents his return as an employe____
*56361 P.S. § 951 (emphasis added). Not all injuries suffered by employees at the above institutions are covered by Act 534; the only injuries covered are those caused by the “act” of an inmate or person committed to such an institution. Krug v. Department of Public Welfare, 9 Pa.Commonwealth Ct. 563, 308 A.2d 168 (1973).
Nearhood argues that he is entitled to benefits under Act 534 on the basis that a student’s yell constituted an “act” that resulted in his injury. We disagree. The record shows that a student called out and that Nearhood reacted to that sound by turning quickly. There is no question that Near-hood was injured in the course of his employment and is entitled to workers’ compensation benefits, but it is also clear from the record that the act which directly caused Nearhood’s injury was his own act (turning quickly and falling to the floor), not the act of a student incarcerated at LYDC. The causal connection between the student’s yell and Nearhood’s injury is, in our view, too tenuous to conclude that Nearhood was injured by “an act of any inmate” and, therefore, the Secretary correctly determined that Nearhood was not eligible for Act 534 benefits.4
Nearhood, however, argues that his June 14, 1992 injury is compensable under Act 534, because it is connected to his prior work-related back injuries which were caused by the acts of students confined in LYDC. He asserts that his weakened back was a substantial factor in causing his June 14, 1992 injury, and, therefore, he is eligible for Act 534 benefits. However, in order to meet his burden of proving that his present injury was related to his prior back injuries, Nearhood was required to produce unequivocal medical evidence to establish a causal relationship between those injuries and his June 14, 1992 injury. Trumpikas v. Department of Public *564 Welfare, 50 Pa.Commonwealth Ct. 130, 412 A.2d 218 (1980). Our review of the record reveals that Nearhood failed to produce any medical evidence connecting his June 14, 1992 injury to his prior injuries. While he did introduce into evidence a medical report by Dr. Robert Green, this report merely describes Nearhood’s symptoms; Dr. Green never opined in that report that Nearhood’s injury was related to a previous work injury.
Accordingly, the order of the Secretary is affirmed.
ORDER
NOW, July 7, 1994, the order of the Secretary of the Department of Public Welfare in the above-captioned matter is hereby affirmed.