Sonia Ulrich, a trainer at Peak Performance on (Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Side Plank/Bridge, part of Functional Warms Ups.

Essential warm-up exercises

Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Side Plank/Bridge, part of Functional Warms Ups.

Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Side Plank/Bridge, part of Functional Warms Ups.

Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates the Cobra, part of Functional Warms Ups.

Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Woodchops-Straight, part of Functional Warms Ups.

Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Arm Hugs, part of Functional Warms Ups.

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Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Arm Hugs, part of Functional Warms Ups.

Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Woodchops-Diagonal, part of Functional Warms Ups.

Sonia Ulrich, a trainer at Peak Performance on
(Credit: Jefferson Siegel)

Sonia Ulrich, a trainer at Peak Performance on West 21st St., demonstrates Woodchops-Diagonal, part of Functional Warms Ups.