delivered the opinion of the Court.
In this appeal of an Industrial Commission (Commission) award, the sole question for decision is whether the Commission erred in holding that Sarah L. Cogbill suffered an injury by industrial accident. Cogbill filed an application with the Commission on May 5, 1980, seeking compensation and medical benefits for a back injury, and on December 8, 1980, the Commission awarded her compensation.
The Virginia Electric and Power Company (Vepco) employed Cogbill as an operations clerk. This position required her to work seated at a desk in a cushioned office chair. Cogbill testified that she could “move around” when she wished.
*356 On Saturday, April 19, 1980, Cogbill worked at a public auction of Vepco’s surplus motor vehicles. She sat in a straight, hardback chair on a truck bed while recording bids on a clipboard resting on her lap. She worked bent over for three and one-half to four hours without interruption. During the auction her back “began to bother her,” and grew painful that evening. Cogbill worked at her regular job the following Monday, Tuesday, and Wednesday. On Thursday, at her supervisor’s suggestion, she went to the company doctor. He referred her to an orthopedic doctor who diagnosed her backache as lumbar strain resulting from her prolonged sitting at the April 19 auction.
The record further establishes that Cogbill had had previous trouble with her back. Between 1969 and June 23, 1975, she took 111 days of sick leave. Of this, a portion was for back-related complaints. From October, 1977, to March 7, 1978, she was absent 20 days for back problems resulting from a fall. Since March, 1978, she had not taken sick leave and had not received medical treatment for backaches or injury.
The hearing commissioner ruled that Cogbill had suffered an injury by accident and awarded compensation. Vepco sought a re.view before the full Commission. Affirming, the Commission referred to the broad definition of “accident” found in
Reserve Life Ins. Co.
v.
Hosey,
A year ago we addressed the interpretation of “injury by accident” in
Badische Corp.
v.
Starks,
After examining prior case law, we reaffirmed the rule set forth in
Virginia Electric, Etc., Co.
v.
Quann,
Cogbill’s situation is analogous to that of the claimant in Badische. First, her injury resulted from an activity similar in nature to her regular job, requiring no different or unusual exertion. Cogbill argues that her bent position, the hard-back chair, and the enforced prolonged sitting combine to make this activity significantly different from her regular job. We disagree. Her required actions and the level of exertion in no way distinguish the two activities. Both jobs were sedentary, requiring Cogbill to write. During the auction, she was at liberty to stand, but chose not to do so because it was more convenient to sit. Finally, the difference between a hard-back and cushioned chair is immaterial.
Second, Cogbill suffered no sudden, obvious mechanical or structural change. Her back, like the claimant’s in Badische, “bothered” her, growing more painful later. Cogbill could not pinpoint when her back began aching or what caused the ache, but she urges this court to accept her argument that prolonged sitting in a bent-over posture caused the injury. She relies on Hosey, supra, for the definition of accident as an unusual and unexpected event. We reject this argument.
In
Rust Engineering Co.
v.
Ramsey,
We will reverse the award entered against Vepco and enter final judgment dismissing Cogbill’s application.
Reversed and final judgment.
Notes
Our recent decisions in
Richmond Memorial Hospital
v.
Crane, 222
Va. 283,
