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Exhibit 24 LIFE TIME FITNESS, INC. Power of Attorney
of Director and/or Officer The undersigned director and/or officer of Life Time Fitness, Inc., a Minnesota corporation,
does hereby make, constitute and appoint Michael R. Robinson and Eric J. Buss, and either of them,
the undersigneds true and lawful attorneys-in-fact, with power of substitution, for the
undersigned and in the undersigneds name, place and stead, to sign and affix the undersigneds
name as such director and/or officer of said Corporation to an Annual Report on Form 10-K or other
applicable form, and all amendments thereto, to be filed by said Corporation with the Securities
and Exchange Commission, Washington, D.C., under the Securities Act of 1934, as amended, with all
exhibits thereto and other supporting documents, with said Commission, granting unto said
attorneys-in-fact, and either of them, full power and authority to do and perform any and all acts
necessary or incidental to the performance and execution of the powers herein expressly granted. IN WITNESS WHEREOF, the undersigned has hereunto set the undersigneds hand this 8th day of
March, 2005. /s/ Bahram AkradiBahram Akradi




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LIFE TIME FITNESS, INC. Power of Attorney
of Director and/or Officer The undersigned director and/or officer of Life Time Fitness, Inc., a Minnesota corporation,
does hereby make, constitute and appoint Michael R. Robinson and Eric J. Buss, and either of them,
the undersigneds true and lawful attorneys-in-fact, with power of substitution, for the
undersigned and in the undersigneds name, place and stead, to sign and affix the undersigneds
name as such director and/or officer of said Corporation to an Annual Report on Form 10-K or other
applicable form, and all amendments thereto, to be filed by said Corporation with the Securities
and Exchange Commission, Washington, D.C., under the Securities Act of 1934, as amended, with all
exhibits thereto and other supporting documents, with said Commission, granting unto said
attorneys-in-fact, and either of them, full power and authority to do and perform any and all acts
necessary or incidental to the performance and execution of the powers herein expressly granted. IN
WITNESS WHEREOF, the undersigned has hereunto set the
undersigneds hand this 10th day of
March, 2005. /s/ Timothy C. DeVriesTimothy C. DeVries




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LIFE TIME FITNESS, INC. Power of Attorney
of Director and/or Officer The undersigned director and/or officer of Life Time Fitness, Inc., a Minnesota corporation,
does hereby make, constitute and appoint Michael R. Robinson and Eric J. Buss, and either of them,
the undersigneds true and lawful attorneys-in-fact, with power of substitution, for the
undersigned and in the undersigneds name, place and stead, to sign and affix the undersigneds
name as such director and/or officer of said Corporation to an Annual Report on Form 10-K or other
applicable form, and all amendments thereto, to be filed by said Corporation with the Securities
and Exchange Commission, Washington, D.C., under the Securities Act of 1934, as amended, with all
exhibits thereto and other supporting documents, with said Commission, granting unto said
attorneys-in-fact, and either of them, full power and authority to do and perform any and all acts
necessary or incidental to the performance and execution of the powers herein expressly granted. IN WITNESS WHEREOF, the undersigned has hereunto set the undersigneds hand this 9th day of
March, 2005. /s/ James F. HalpinJames F. Halpin




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LIFE TIME FITNESS, INC. Power of Attorney
of Director and/or Officer The undersigned director and/or officer of Life Time Fitness, Inc., a Minnesota corporation,
does hereby make, constitute and appoint Michael R. Robinson and Eric J. Buss, and either of them,
the undersigneds true and lawful attorneys-in-fact, with power of substitution, for the
undersigned and in the undersigneds name, place and stead, to sign and affix the undersigneds
name as such director and/or officer of said Corporation to an Annual Report on Form 10-K or other
applicable form, and all amendments thereto, to be filed by said Corporation with the Securities
and Exchange Commission, Washington, D.C., under the Securities Act of 1934, as amended, with all
exhibits thereto and other supporting documents, with said Commission, granting unto said
attorneys-in-fact, and either of them, full power and authority to do and perform any and all acts
necessary or incidental to the performance and execution of the powers herein expressly granted. IN WITNESS WHEREOF, the undersigned has hereunto set the undersigneds hand this 7th day of
March, 2005. /s/ Guy C. JacksonGuy C. Jackson




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LIFE TIME FITNESS, INC. Power of Attorney
of Director and/or Officer The undersigned director and/or officer of Life Time Fitness, Inc., a Minnesota corporation,
does hereby make, constitute and appoint Michael R. Robinson and Eric J. Buss, and either of them,
the undersigneds true and lawful attorneys-in-fact, with power of substitution, for the
undersigned and in the undersigneds name, place and stead, to sign and affix the undersigneds
name as such director and/or officer of said Corporation to an Annual Report on Form 10-K or other
applicable form, and all amendments thereto, to be filed by said Corporation with the Securities
and Exchange Commission, Washington, D.C., under the Securities Act of 1934, as amended, with all
exhibits thereto and other supporting documents, with said Commission, granting unto said
attorneys-in-fact, and either of them, full power and authority to do and perform any and all acts
necessary or incidental to the performance and execution of the powers herein expressly granted. IN WITNESS WHEREOF, the undersigned has hereunto set the undersigneds hand this 9th day of
March, 2005. /s/ David A. LandauDavid A. Landau




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LIFE TIME FITNESS, INC. Power of Attorney
of Director and/or Officer The undersigned director and/or officer of Life Time Fitness, Inc., a Minnesota corporation,
does hereby make, constitute and appoint Michael R. Robinson and Eric J. Buss, and either of them,
the undersigneds true and lawful attorneys-in-fact, with power of substitution, for the
undersigned and in the undersigneds name, place and stead, to sign and affix the undersigneds
name as such director and/or officer of said Corporation to an Annual Report on Form 10-K or other
applicable form, and all amendments thereto, to be filed by said Corporation with the Securities
and Exchange Commission, Washington, D.C., under the Securities Act of 1934, as amended, with all
exhibits thereto and other supporting documents, with said Commission, granting unto said
attorneys-in-fact, and either of them, full power and authority to do and perform any and all acts
necessary or incidental to the performance and execution of the powers herein expressly granted. IN WITNESS WHEREOF, the undersigned has hereunto set the undersigneds hand this 8th day of
March, 2005. /s/ Stephen R. SeftonStephen R. Sefton