If you’ve resolved to sweat more and weigh less, sign up for one, or all, of the classes below. Leave your excuses at the door and make 2015 your healthiest year yet!

1. Mixed at The Dailey Method. Strengthening and stretching class that works all the major muscle groups and combines ballet barre work, core conditioning, yoga and orthopedic exercises. 60 minutes.
   
2. Orange 60 Workout at Orangetheory Fitness. Switch between heart-rate-based treadmill interval training, indoor rowing and weight training blocks. 60 minutes.
   
3. CORE Sessions at Kaia FIT. Focus on maintenance, cardiovascular endurance and muscular strength while engaging the major muscle groups. Programs are five weeks with three classes per week; starts in February.
   
4. Boot Camp at Mama Bootcamp. Head to Maidu Park or Rocklin Endurance Sports for core-strengthening exercises, followed by a walk or jog, strength-training exercises and a few minutes of stretching. 90 minutes.
   
5. Hot Pilates Extreme at Body Heat Hot Pilates and Yoga. In a 100-degree room with 40-percent humidity, combine high intensity intervals, circuit training and Pilates while listening to upbeat music. 60 minutes.
   
6. Indoor Cycling (Spin) at THE STUDIO Martial Arts & Fitness. High-calorie-burning interval training on the cycle is combined with cross training (using weights, TRX, body weight and plyometrics) to efficiently build muscle. 60 minutes.
   
7. Taekwondo Self-Defense and Martial Arts Training for Adults at Robinson’s Taekwondo. Breathing and concentration exercises sharpen your senses and reflexes while allowing you to relax. 45 minutes.
   
8. Beginning Jazz at Anti Gravity School of Dance. Learn the basics of jazz in this energetic class that consists of unique moves, fancy footwork, big leaps and quick turns. 45 minutes. 
   
9. KravFit Kickboxing at Dragon Star Karate. Combine kickboxing, Krav Maga (an eclectic hand-to-hand combat system), resistance training and self-defense while burning fat and toning muscle. 45 minutes. 
10. Vinyasa Flow at Veera Yoga. Link breath with movement in a slightly heated room as you flow from one pose to the next, while improving balance, gaining flexibility and strength. 60 and 75 minutes.