Exhibit 99.1

Contacts:

Investor Relations: John Heller, 952-229-7427, ir@lifetimefitness.com

Media Relations: Jason Thunstrom, 952-229-7435, pr@lifetimefitness.com

FOR IMMEDIATE RELEASE

LIFE TIME FITNESS ANNOUNCES FOURTH QUARTER AND

FULL YEAR 2013 FINANCIAL RESULTS

CHANHASSEN, Minn. (February 20, 2014) – Life Time Fitness, Inc. (NYSE: LTM), The Healthy Way of Life Company, today reported its financial results for the fourth quarter and full year ended December 31, 2013.

Fourth quarter 2013 revenue grew 5.7% to $291.0 million from $275.3 million during the same period last year. Revenue for the full year grew 7.0% to $1.206 billion from $1.127 billion during the same period last year.

Net income for the quarter was $26.0 million, or $0.63 per diluted share, compared to net income of $23.4 million, or $0.56 per diluted share, for 4Q 2012. Net income for the full year was $121.7 million, or $2.93 per diluted share, compared to net income of $111.5 million, or $2.66 per diluted share for the prior-year period.

“2013 served as an important transition year for our company,” said Bahram Akradi, chairman, president and chief executive officer. “We continued to differentiate Life Time in keeping with our strategy to operate a high barrier to entry business model in what is a low barrier to entry industry. We also concentrated on further aligning our company for higher growth in 2014 and beyond by ensuring our businesses operate in highly synergistic fashion and our comprehensive array of healthy way of life programs and services are optimized to deliver tremendous value for communities, organizations and individuals.”

During the quarter, the Company opened its third center in New Jersey, located in Montvale (greater New York market). In 2014, plans call for six new center openings in existing and new markets, led by Westchester County, New York, the Company’s second New York location, which opened on February 6. The remaining planned new center openings will be in the Tampa, Florida; Orange County, California; Des Moines, Iowa; Detroit, Michigan; and Las Vegas, Nevada markets.

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Life Time Announces Fourth Quarter and Full Year 2013 Results – Page 2

Three and Twelve Months Ended December 31, 2013, Financial Highlights:

Total revenue for the fourth quarter grew 5.7% to $291.0 million from $275.3 million in 4Q 2012. Total revenue for the full year grew 7.0% to $1.206 billion from $1.127 billion during the prior-year period.

Total memberships grew 0.3% to 789,490 at December 31, 2013, from 787,003 at December 31, 2012.

Total operating expenses during 4Q 2013 were $242.4 million compared to $231.4 million for 4Q 2012. Total operating expenses for the full year were $981.3 million compared to $918.7 million in 2012.

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Life Time Announces Fourth Quarter and Full Year 2013 Results – Page 3

Net income for 4Q 2013 was $26.0 million, or $0.63 per diluted share, compared to net income of $23.4 million, or $0.56 per diluted share, for 4Q 2012. Net income for the full year was $121.7 million, or $2.93 per diluted share, compared to net income of $111.5 million, or $2.66 per diluted share, for the prior-year period.

EBITDA for 4Q 2013 was $78.7 million compared to $74.1 million in 4Q 2012. For the full year, EBITDA was $345.0 million compared with $324.7 million in the prior-year period.

Cash flows from operating activities for the full year totaled $258.4 million compared to $255.7 million in the prior-year period.

Weighted average fully diluted shares for 4Q 2013 totaled 41.3 million compared to 42.0 million in 4Q 2012. For the full year, weighted average fully diluted shares totaled 41.5 million compared to 42.0 million for the prior-year period.

2014 Business Outlook:

The following statements are based on the Company’s current expectations for fiscal year 2014 and incorporate 2013 operating trends. These 2014 expectations are subject to the risks and uncertainties further described in the Company’s forward-looking statements:

As announced on February 13, 2014, the Company will hold a conference call today at 10:00 a.m. ET to discuss its fourth quarter and full year 2013 results. Bahram Akradi, Michael Robinson, executive vice president and chief financial officer, and John Heller, vice president, Finance and Investor Relations, will host the conference call. The conference call will be webcast and may be accessed via the Company’s Investor Relations section of its website at lifetimefitness.com. A replay of the call will be available the same day via the Company’s website beginning at approximately 2:00 p.m. ET.

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Life Time Announces Fourth Quarter and Full Year 2013 Results – Page 4

As announced on August 27, 2013, Robinson plans to retire as executive vice president and chief financial officer following a 12-year tenure with the Company. The effective date of this transition is March 1, 2014. The Company plans to retain Robinson as an employee or consultant for a period of time thereafter. Effective March 2, 2014, Eric J. Buss, who currently serves as executive vice president, will assume the additional role of interim chief financial officer. Buss joined Life Time in September 1999 as vice president of Finance and general counsel. Prior to joining the Company, Buss was an associate with the law firm of Faegre & Benson LLP (now Faegre Baker Daniels LLP) and, before that, he served as an auditor with Arthur Andersen LLP.

About Life Time Fitness, Inc.

As The Healthy Way of Life Company, Life Time Fitness (NYSE:LTM) helps organizations, communities and individuals achieve their total health objectives, athletic aspirations and fitness goals by engaging in their areas of interest — or discovering new passions — both inside and outside of Life Time’s distinctive and large sports, professional fitness, family recreation and spa destinations, most of which operate 24 hours a day, seven days a week. The Company’s Healthy Way of Life approach enables customers to achieve this by providing the best programs, people and places of uncompromising quality and value. As of February 20, 2014, the Company operated 109 centers under the LIFE TIME FITNESS^® and LIFE TIME ATHLETIC^® brands in the United States and Canada. Additional information about Life Time centers, programs and services is available at lifetimefitness.com.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements can usually be identified by the use of terminology such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “evolve,” “expect,” “forecast,” “intend,” “looking ahead,” “may,” “opinion,” “plan,” “possible,” “potential,” “project,” “should,” “will” and similar words or expressions. Forward-looking statements are subject to certain risks and uncertainties that could cause the Company’s actual results in the future to differ materially from its historical results and those presently anticipated or projected. Among these factors are attracting and retaining members, risks related to our debt levels and debt covenants, the ability to access our existing credit facility and obtain additional financing, strains on our business from continued and future growth, including potential acquisitions and other strategic initiatives, risks related to maintenance and security of our data, potential recognition of compensation expense related to performance-based stock grants, potential impairment of long-lived assets, goodwill and intangible assets, competition from other health and fitness centers, identifying and acquiring suitable sites for new centers, delays in opening new centers and other factors set forth in the risk factor section of the Company’s annual report on Form 10-K filed with the Securities and Exchange Commission. The Company cautions investors not to place undue reliance on any such forward-looking statements, which speak only as of the date on which such statements were made. The Company undertakes no obligation to update such statements to reflect events or circumstances arising after such date. All remarks made during the Company’s preliminary financial results webcast will be current at the time of the webcast and the Company is under no obligation to update the recording.

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Life Time Announces Fourth Quarter and Full Year 2013 Results – Page 5

LIFE TIME FITNESS, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(In thousands)

Life Time Announces Fourth Quarter and Full Year 2013 Results – Page 6

LIFE TIME FITNESS, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands except per share data)

Life Time Announces Fourth Quarter and Full Year 2013 Results – Page 7

LIFE TIME FITNESS, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

Life Time Announces Fourth Quarter and Full Year 2013 Results – Page 8

Non-GAAP Financial Measures

This release and the related conference call disclose certain non-GAAP financial measures.

EBITDA. Earnings Before Interest, Income Taxes and Depreciation and Amortization (EBITDA) is a non-GAAP measure consisting of net income plus interest expense, net, provision for income taxes and depreciation and amortization. This term, as the Company defines it, may not be comparable to a similarly titled measure used by other companies and is not a measure of performance presented in accordance with GAAP. The Company uses EBITDA as a measure of operating performance. The funds depicted by EBITDA are not necessarily available for discretionary use if they are reserved for particular capital purposes, to maintain compliance with debt covenants, to service debt or to pay taxes. EBITDA should not be considered as a substitute for net income, net cash provided by operating activities or other income or cash flow data prepared in accordance with GAAP. Additional details related to EBITDA are provided in the Form 8-K that the Company filed with the Securities and Exchange Commission on the date of this press release. The following table provides a reconciliation of net income, the most directly comparable GAAP measure, to EBITDA:

RECONCILIATION OF NET INCOME TO EBITDA

(In thousands)

(Unaudited)

Free Cash Flow. Free cash flow is a non-GAAP measure consisting of net cash provided by operating activities, less purchases of property and equipment, excluding acquisitions. This term, as the Company defines it, may not be comparable to a similarly titled measure used by other companies and does not represent the total increase or decrease in the cash balance presented in accordance with GAAP. The Company uses free cash flow as a measure of cash generated after spending on property and equipment. Free cash flow should not be considered as a substitute for net cash provided by operating activities prepared in accordance with GAAP. Additional details related to free cash flow are provided in the Form 8-K that the Company filed with the Securities and Exchange Commission on the date of this press release. The following table provides a reconciliation of net cash provided by operating activities, the most directly comparable GAAP measure, to free cash flow:

RECONCILIATION OF NET CASH PROVIDED BY OPERATING ACTIVITIES TO FREE CASH FLOW

(In thousands)

(Unaudited)