HR booster Crossword Clue
Looking for the answer to “HR booster” from the Washington Post Sunday crossword of January 4, 2026? It has 6 letters. Flip the tiles one at a time, try a hint first, or look through the rest of that puzzle.
Crossword answer
WASHINGTON POST SUNDAY, JANUARY 4, 2026
Tap a tile to see one letter, or show the whole answer.
CARDIO is the answer to “HR booster”. It means an exercise involving the heart and blood vessels.
Hints
Three clues to the answer, gentle first. Open one at a time.
Hint 1 Meaning
An exercise involving the heart and blood vessels.
Hint 2 Anagram
Its letters, scrambled: RACOID.
Hint 3 Another clue
It has also been clued as “Exercising on a treadmill, for example”.
More clues from the Washington Post Sunday (January 4, 2026)
Across
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- 25. Mosquito-borne illness (Colorado)11 letters, starts with DDENGUEFEVER
- 27. Perceived by touch or taste, e.g.7 letters, starts with SSENSATE
- 28. Yearns (for)5 letters, starts with LLONGS
- 29. Feeling when blowing a fuse3 letters, starts with IIRE
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- 33. Pipe full of hot air4 letters, starts with FFLUE
- 34. Bombs in the NFL, e.g.6 letters, starts with PPASSES
- 37. Businesses involved in the mass production of clothing, collectively (Indiana)15 letters, starts with GGARMENTINDUSTRY
- 43. Saxophonists' items5 letters, starts with RREEDS
- 44. Marian Anderson performance that is aptly hidden in her name4 letters, starts with AARIA
- 45. Hearty bar beverage5 letters, starts with SSTOUT
- 46. Produce, as a tone4 letters, starts with EEMIT
- 48. Change, as boundary lines6 letters, starts with RREDRAW
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- 55. Narrative progression3 letters, starts with AARC
- 58. Significant other3 letters, starts with BBAE
- 59. Those enforcing rules that Kings must live by4 letters, starts with RREFS
- 61. Turbine spinners6 letters, starts with RROTORS
- 62. Deadly contest4 letters, starts with DDUEL
- 63. "Secret" ingredient?5 letters, starts with SSAUCE
- 65. Steering wheels at sea5 letters, starts with HHELMS
- 66. HR booster6 letters, starts with CCARDIO
- 68. Documentary photographer who's considered a pioneer of South African resistance art (Nebraska)10 letters, starts with OOMARBADSHA
- 72. Critical moment (Michigan)10 letters, starts with FFLASHPOINT
- 74. Western justice figure6 letters, starts with LLAWMAN
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- 77. Big animal desired in a 1953 Gayla Peevey Christmas song, briefly5 letters, starts with HHIPPO
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- 79. Take badly?6 letters, starts with TTHIEVE
- 81. Strip, as a citrus layer4 letters, starts with PPEEL
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- 86. 2010 sci-fi sequel involving a virtual reality world called the Grid (California)10 letters, starts with TTRONLEGACY
- 89. Creature featured on Catster6 letters, starts with FFELINE
- 91. Former senator Evan4 letters, starts with BBAYH
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- 104. Martin who won an Oscar for his portrayal of Bela Lugosi in "Ed Wood"6 letters, starts with LLANDAU
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Down
- 1. Deceitful declarations4 letters, starts with LLIES
- 2. Section of a field4 letters, starts with AACRE
- 3. Circulatory system tube4 letters, starts with VVEIN
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- 6. Inventors' safeguards7 letters, starts with PPATENTS
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- 10. Resides (in)6 letters, starts with DDWELLS
- 11. Disperse during a search6 letters, starts with FFANOUT
- 12. Endorser with a pen6 letters, starts with SSIGNER
- 13. Missing the mark3 letters, starts with OOFF
- 14. "All systems ___ go"3 letters, starts with AARE
- 15. Update, as a blog post6 letters, starts with RREVISE
- 16. Blow a fuse6 letters, starts with SSEERED
- 20. A real jerk3 letters, starts with TTUG
- 22. Apparel often featured on "Project Runway"5 letters, starts with DDRESS
- 24. ___-sex marriage4 letters, starts with SSAME
- 26. Power that Karen in "Mean Girls" thought she might have (but she thought it had an N at the end, which made it a sports network)3 letters, starts with EESP
- 31. Chrome destinations5 letters, starts with SSITES
- 32. In a bit, in a poem4 letters, starts with AANON
- 33. It's gonna happen6 letters, starts with FFUTURE
- 35. Like a rainless terrain4 letters, starts with AARID
- 36. Tennis match segment3 letters, starts with SSET
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- 38. Surface calculation4 letters, starts with AAREA
- 39. Heads off into the sunset, as in a western9 letters, starts with RRIDESAWAY
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Fresh clues from recent puzzles
Questions
What is the answer to “HR booster”?
CARDIO, 6 letters: an exercise involving the heart and blood vessels.
When was “HR booster” last seen in a crossword?
In the Washington Post Sunday crossword of January 4, 2026.
How many letters does the answer have?
6 letters, starting with C.