SAN JOSE, Calif. — Madina Kaderi, 18, who walked over burning coals and suffered blisters during a Tony Robbins seminar here, returned to the San Jose Convention Center on Sunday for the fourth and final day of motivational talks.

She called the fire walk a positive experience and blamed herself for her injury. “I got scared,” she said. And with her Vans now safely on her feet, she added, “I’m glad I felt the pain.”

Ms. Kaderi was one of nearly two dozen who were injured on Thursday, the first night of Mr. Robbins’s “Unleash the Power Within” seminar, which included a fire walk as a signature experience. She said she did not seek medical attention, but many of those hurt reported second- or third-degree burns, Capt. Reggie Williams of the San Jose Fire Department told The Associated Press.

Thousands participated in the walk, which stretched down 24 lanes, each around eight feet long.

“It transformed people’s lives in a single night,” said Carolynn Graves, 50, a real estate agent from Toronto, who crossed the coals without injury. “It’s a metaphor for facing your fears and accomplishing your goals.”